look at the given synthesis and the provided reagents. fill in the blanks with the single letter code of the appropriate reagent, or the appropriate descriptive vocabulary word/phrase to complete the description. remember the computer is very literal so check your spelling carefully.

Answers

Answer 1

The reagent are used in the chemical reaction to cause the chemical reaction or the test performed if one occurred.

The reagents are the compounds or the mixture that are added to the chemical reaction in order to start the chemical reaction. The reagent is not necessarily be consumed during the chemical reaction. the reagent is used to identify the compound or to measure the substance if it is present in the reaction.

The  reagent is  the  initiator , solvent , catalyst etc. the example of the reagents are : Tollen's reagent , Fehling's reagent , Fenton's reagent and collins reagent etc.

The question is incomplete, I answer the question in general according to my knowledge.

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Related Questions

the presumptive definition of driving under the influence in florida is having a blood alcohol content (bac) of .08.

Answers

True. The presumptive definition of Driving Under the Influence in Florida is having a Blood Alcohol Content (BAC) of .08.

True. In Florida, it is illegal to operate a motor vehicle with a blood alcohol content (BAC) of .08 or higher. This is known as driving under the influence (DUI). The legal limit for DUI in Florida is .08.

If a driver is found to have a BAC of .08 or higher, they can be arrested for DUI. Florida also has a Zero Tolerance Law for drivers under 21, meaning that any BAC .02 or higher can lead to an arrest for DUI.

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Complete question:

The presumptive definition of Driving Under the Influence in Florida is having a Blood Alcohol Content (BAC) of .08. true or false

6. For each skeleton equation below, classify the type of reaction as a synthesis decomposition, single replacement, double replacement, neutralization, or combustion reaction. Justify your classification. Then write the balanced chemical equation for each.

a) C4H10(g) + O2(g) → CO2(g) + H₂O(g)

b) Li(s) + N₂(g) → Li3N(s)

c) AgNO3(aq) + Na₂CrO4(aq)
NaNO3(aq) + Ag₂CrO4(s)

d) MgO(s)→ Mg(s) + O₂(g)

e) HI(aq) + KOH(aq) →KI(aq) +H₂O(l)

f) AlPO4(aq) + Mg(s) → Al(s) + Mg3(PO4)2(aq)

Answers

Answer:

a) combustion reaction

balanced equation: 2C4H10 + 13O2 → 8CO2 + 10H2O

b) synthesis reaction

balance equation: 6Li + N2 → 2Li3N

c) double replacement

balanced equation: 2AgNO3 + Na2CrO4 → 2NaNO3 + Ag2CrO4

d) decomposition

balanced equation: 2MgO → 2Mg + O2

e) double dispalcement

balanced equation: HI + KOH → KI + H2O

f)  single displacement

2AlPO4 + 3Mg → 2Al + Mg3(PO4)2

Explanation (detailed):

a)

Word Equation: Butane + Dioxygen = Carbon Dioxide + Water

How to balance:

1- Label Each Compound With a Variable

Label each compound (reactant or product) in the equation with a variable representing the unknown coefficients.

aC4H10 + bO2 = cCO2 + dH2O

2- Create a System of Equations

Create an equation for each element (C, H, O) where each term represents the number of atoms of the element in each reactant or product.

C: 4a + 0b = 1c + 0d

H: 10a + 0b = 0c + 2d

O: 0a + 2b = 2c + 1d

3-Solve For All Variables

Use substitution, gauss elimination, or a calculator to solve for each variable.

(keep doing this for every equation)

if you have any questions feel free to ask ill be happy to answer

robert boyle and robert hooke worked together and discovered some important physics concepts. their work lead to the formation of boyle's law; this describes the . flow of fluids in the body and lead to the formation of the humoral theory flow of fluids in the body and lead to the formation of the humoral theory movement of oxygen and lead to the discovery of how blood delivered oxygen to tissues movement of oxygen and lead to the discovery of how blood delivered oxygen to tissues relationship between blood flow and the heart rhythm and helped them discover how the heart works relationship between blood flow and the heart rhythm and helped them discover how the heart works relationship between pressure and air volume and led to the understanding of how respiration works relationship between pressure and air volume and led to the understanding of how respiration works

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A fundamental property of chemistry called Boyle's Law describes how a gas behaves when it is kept at a constant temperature. The rule asserts that the volume of a gas is inversely proportional to the pressure it exerts at a certain temperature. Robert A. Boyle discovered this relationship in 1662.

This empirical relationship, which Robert Boyle, a scientist, first proposed in 1662, argues that, under constant temperature, the pressure (p) of a given amount of gas changes inversely with its volume (v); in equation form, this means that pv = k, a constant.

Blood flows into the syringe to balance the pressure difference since blood in a vein has a higher pressure than the gas in the syringe. One of the three gas laws that govern the behavior of gases is Boyle's law.

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Determine how many grams of CO2 are produced by burning 7.49 g of C4H10

Answers

22.704 grams of CO2 are produced by burning 7.49 g of C4H10

This can be calculated as :

The basic reaction is: C4H10 + O2 = CO2 + H2O

We have 4 carbons for each reactant molecule, and this reacts with oxygen to form carbon dioxide and water.  We, therefore, need to show 4 CO2 molecules to consume these 4 carbons.

C4H10 + O2 = 4CO2 + H2O

Next, let's balance the H atoms.  The 10 H atoms from the C4H10 must find a home in the water molecules.  5 water molecules can be made from 10 hydrogen atoms.

C4H10 + O2 = 4CO2 + 5H2O

The only atom left is oxygen.  So far, the product side contains 13 O atoms (8 from the CO2 and 5 from the H2O).  Awkward, since oxygen only comes in pairs, an even number.  Let's use a fraction, 6.5, for the O2 for now, just to get it balanced:

C4H10 + 6.5O2 = 4CO2 + 5H2O

This equation is balanced, but not legal since we can't have 1/2 of an O2 molecule.  So simply multiply all coefficients by 2:

2C4H10 + 13O2 = 8CO2 + 10H2O

The equation is now properly balanced.  It is telling us that we'll get 8 moles of CO2 for every 2 moles of C4H10.  That's a molar ratio of 4CO2/1 C4H8.

Let's find the moles of C4H8.  Divide the grams of C4H8 by its molar mass (58.04g/mole).

7.49g/(58.04g/mole) = 0.12904 moles C4H8 .

Now multiply moles C4H8 by the molar ratio we calculated above:

(0.12904 moles C4H8 )*(4 moles CO2/1 moles C4H8) = 0.516 moles CO2

Convert to grams CO2 by multiplying by CO2's molar mass:

(0.516 moles CO2)*(44 g/mole CO2) = 22.704 grams

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Which one of the following pairs cannot be mixed together to form a buffer solution?
a)C5H5N, C5H5NHCl
b)HC2H3O2, NaOH (C2H3O2- = acetate)
c)KOH, HI
d)NH2CH3, HCl
e)NaClO, HNO3

Answers

It is impossible to combine KOH and HI to create a buffer solution.

What is a buffer solution?

A buffer solution, also referred to as a pH buffer or hydrogen ion buffer, is an aqueous mixture of a weak acid and its conjugate base, or vice versa. The pH scarcely changes at all when a small amount of a strong acid or basic is added to it. Buffer solutions are used in a wide range of chemical processes to keep pH values almost constant. Buffering is used by many living systems to regulate pH in the natural world. For instance, the bicarbonate buffering system regulates the pH of blood, and bicarbonate also acts as a buffer in the ocean.

The pH of a solution containing a buffering agent can only fluctuate within a specific range, regardless of what else may be in the solution. This is necessary for the enzymes in biological systems to function properly. For instance, the primary mechanism for maintaining the blood's pH between 7.35 and 7.45 is a blend of carbonic acid and bicarbonate found in the plasma component of human blood. Outside of this exact pH range, metabolic diseases called acidosis and alkalosis that finally end in mortality rapidly develop if the necessary buffering capacity is not immediately restored.

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The student performs a second titration using the 0.10MNaOH(aq) solution again as the titrant, but this time with a 20.mL sample of 0.20MHCl(aq) instead of 0.10MHCl(aq).
1. The box below to the left represents ions in a certain volume of 0.10MHCl(aq). In the box below to the right, draw a representation of ions in the same volume of 0.20MHCl(aq). (Do not include any water molecules in your drawing.)
2. graph in part (d), carefully draw a curve that shows the results of the second titration, in which the student titrates a 20.mL sample of 0.20MHCl(aq) with 0.10MNaOH(aq)

Answers

The box below to the left represents ions in a certain volume of 0.10MHCl(aq). In the box below to the right, representation of ions in the same volume of 0.20MHCl will contain eight dots and eight circles.

The student performs a second titration using the 0.10 M NaOH(aq) solution again as the titrant, but this time with a 20.mL sample of 0.20MHCl(aq) , instead of 0.10 M HCl. the square represents the  0.10 M HCl(aq) solution is contains four dots and the four circles.

Then the square representation of ions in the same volume of 0.20MHCl(aq) is eight dots and the eight circles. the image is attached below with representation of the sots and the circles.

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in the citric acid cycle (see the figure), beginning with one molecule of isocitrate and ending with fumarate, how many atp molecules can be made through substrate-level phosphorylation?

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In the citric acid cycle , beginning with one of the molecule of isocitrate and ending with the fumarate, the ATP molecules can made through the substrate-level phosphorylation is one molecule.

In the citric acid cycle, the substrate level phosphorylation is the high energy of the phosphate group in the organic molecule. it transfers to the ADP to produces the ATP. it is the metabolic reaction and form the ATP molecules. The citric acid cycle is called as Krebs cycle also.

Thus, the number of ATP molecules form during the citric acid cycle that start with the one molecule of the isocitrate and end with the fumarate is the one molecule.

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Changing gloves often will minimize the spread of chemicals. To properly remove gloves, first, ____, and then, ___. Then insert ___ between the interior edge of the second glove and the skin, and remove the second glove.grasp the exterior of one glove with a gloved hand, peel the first glove, a bare finger

Answers

Pull the glove inside out as you peel it away from your body. Peel one glove away from your body and grab it by the wrist on the outside. Avoid touching your exposed skin.

Describe chemicals.

Any material with a known composition is a chemical.

How to take off your gloves:

Grab one glove's palm just above your wrist. Turning the glove inside out, carefully remove it.

Hold the glove in the palm of the hand that is still wearing gloves.

The glove must be pulled off from the inside out.

After taking off your gloves and before handling any surfaces or items, always wash your hands.

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Show that the hydrogenic 2px, and 2py, orbitals are obtained by the linear combination of 2p1, and 2p2, functions and 2pz, is directly equal to 2p0

Answers

The linear combination of 2p1 and 2p2 functions can be used to generate the hydrogenic 2px and 2py orbitals.

What is orbitals?

Orbitals are regions of space that describe the probable location of an electron around an atom's nucleus. They are usually shown as a cloud-like region and are divided into sub-regions called s, p, d, and f orbitals. Each orbital has a specific energy level and a specific shape. The orbitals determine the properties of the atom and its chemical behavior. Electrons in different orbitals interact in different ways, and this determines the type of bonds that form between atoms.

This is done by adding and subtracting the two functions and then normalizing the resultant wave functions. This gives the following expressions:

2px = (1/√2)(2p1 + 2p2)

2py = (1/√2)(2p1 - 2p2)

The hydrogenic 2pz orbital is simply equal to the 2p0 function, since the z-axis is the axis of highest symmetry.

Thus, 2pz = 2p0.

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PLEASE ANSWER THIS QUESTION (EXPLAIN AND CORRECTLY ANSWER) FOLLOW THE INSTRUCTIONS IN THE IMAGE

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There can be release of radiations like gamma radiation. There can be emission of particles too like alpha particle. Therefore, the given nuclear decay reaction is balanced.

What is nuclear decay?

It is process in which the radioactive element releases particles or radiations. Alpha particles is ⁴₂He. Alpha particle is nothing but helium particle.

So, according to our questions Uranium-238 is undergoing alpha emission. The balanced reaction can be written as

²³⁸U₉₂ ²³⁴ [tex]\rightarrow[/tex]Th₉₀+⁴₂He

So, From above reaction we can see that the total mass on reactant side is equal to total mass on product side. So, this reaction is balanced.

Therefore, the given nuclear decay reaction is balanced.

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amino acid addition to a growing chain happens at the [ select ] and [ select ] (consider only the formation of a peptide bond and not other steps such as translocation)
1. for the first blank, is it a C terminal / N terminal?
2. Do they require GTP/ ATP/ or none of them?

Answers

Amino acid addition to a growing chain happens at the C terminal and ATP is required.

Proteins are made up of substances called amino acids. Proteins and amino acids are the components of life. Amino acids are the byproducts of the digestion or breakdown of proteins. Amino acids are used by the human body to create proteins that benefit the organism. Two ATP molecules are needed for amino acid activation, two more for peptide bond formation and ribosome translation, as well as an additional ATP molecule or so for error correction and the synthesis of sequences that are lost during protein maturation, in order to add an amino acid to a growing peptide chain.

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according to the big bang during the very earliest moments of the universe the first photons appeared in the universe were

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according to the big bang during the very earliest moments of the universe the first photons appeared in the universe Were those released during decoupling (visible today as the cosmic microwave background) and 21 cm radio emissions occasionally emitted by hydrogen atoms.

The Big Bang theory is a physiological concept that explains how the universe is expanding from a dense population and heat state. Various Big Bang cosmic models explain the progression of the visible universe from its earliest known time frames to its global context form. During a talk for a March 1949 BBC Radio broadcast, English astronomer Fred Hoyle is credited with coining the term "Big Bang," saying: "Such theories were predicated on the hypothesis that all of the material in the universe was created inside one big bang at a special time in the distant past."

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Suppose 6 M HCl is substituted for the 3 M HCl in a procedure. What would be the consequence of this substitution?

Answers

If 6 M HCl is substituted for the 3 M HCl in a procedure, the concentration of the acid will be doubled.

This could have several consequences, depending on the specific procedure. In general, doubling the concentration of the acid will increase the rate of any reaction that involves the acid, so the reaction could proceed more quickly or with greater intensity than it would with the 3 M HCl.

In addition, the increased concentration of HCl could cause the reaction to become more acidic, so other components of the reaction may be affected as well. Finally, the increased concentration of HCl could increase the risk of hazards, such as burns, if proper safety precautions are not taken.

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part a - identify the product of radioactive decay identify the product of radioactive decay and classify the given nuclear reactions accordingly. drag the appropriate items to their respective bins.

Answers

The daughter of the parent isotope, which is the end result of a radioactive decay process, may be unstable in which case it will also degrade. Up till a stable nuclide has been produced, the process goes on.

Nuclear reactions are collisions between two nuclei or between a nucleus and an outside subatomic particle that result in the creation of one or more new nuclides in nuclear physics and nuclear chemistry. Consequently, at least one nuclide must change throughout a nuclear reaction.

Ionizing radiation is released as a result of radioactive decay. Among the ionising radiation that is released are alpha, beta, and/or gamma rays. Unbalanced atoms known as radionuclides are the site of radioactive decay. The release of energy in the form of ionising radiation occurs during radioactive decay. Alpha particles, beta particles, and/or gamma rays are all examples of the ionising radiation that is released.

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the compound c5h8o2 exists in two forms in equilibrium with one another. (lone pairs are not shown.) what change occurs in the hybrid orbital set used by the c atom labeled carbon 3?

Answers

An electron in a molecule behaves wave-like according to a function called a molecular orbital. Utilizing quantum mechanics, the molecular orbital theory defines the electrical structure of molecules.

What would an example of equilibrium look like?

There are several examples of equilibrium, such as: an open book that is lying flat. a moving object that is moving steadily a chemical reaction takes place where the rates of both the forward and reverse reactions are identical.

What is straightforward equilibrium?

A system is at an equilibrium when all of its external forces are in balance. When a system is in equilibrium, nothing changes.

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mass percent question: in a universe far far away, all of their elements happen to weigh nice even number that are easy to do calculations with. so for this question we will be using their elements/molecules. formatting issues: don't worry about sig figs. just put your number as you calculate it. do not include the percent sign or any units in your answers. canvas just doesn't handle this stuff well.

Answers

The mass percent formulas is given as :

mass percent = ( mass of the solute / mass of the solution ) × 100 %

The mass is generally represented in the grams. the mass percent percent mean the weight percent or w/w %. the mass formula is given as follows :

mass percent = ( mass of the solute / mass of the solution ) × 100 %

let us take an example if mass of solute = 7 g and the mass of solvent = 367 g.  the mass percent is given as :

mass of solution = 7 + 367 = 374 g

mass percent = ( mass of the solute / mass of the solution ) × 100 %

                      = (7 / 374) × 100 %

                      = 1.86 %

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Compound X has the molecular formula C9H19Cl, and when treated with KOH in ethanol, 3 total products are obtained. Which of the following is compound X?

Answers

The reaction that treated with KOH in ethanol is explained by the E2 Elimination.

Compound has the molecular formula C9H19Cl and when treated with KOH, ethanol is obtained. haloalkanes that on reaction with a base form an alkene as the major product 2-chloro-2,6-dimethylheptane and 3-bromo-2,6-dimethylheptane respectively. On reaction with base, both the compounds form 2,6-dimethylhept-2-ene as major product via E2-elimination. This major product is decided by Zaitsev's rule. The alkene reacts with one mole H2 to form 2,6-dimethylheptane via addition reaction. Reaction with HCl occurs via Markovnikov addition, chlorine group is added to second carbon and 2-chloro-2,6-dimethylheptane is formed again. Therefore,  2-chloro-2,6-dimethyheptane and  3-bromo-2,6-dimethylheptane.

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Electroplating is a way to coat a complex metal object with a very thin (and hence inexpensive) layer of a precious metal, such as silver or gold. In essence the metal object is made the cathode of an electrolytic cell in which the precious metal cations are dissolved in aqueous solution. Suppose a current of 0.270 A is passed through an electroplating cell with an aqueous solution of Ag_2 SO_4 in the cathode compartment for 72.0 seconds. Calculate the mass of pure silver deposited on a metal object made into the cathode of the cell. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol.

Answers

Mass of the pure silver deposited on a metal object made into the cathode of the cell is calculated to be 0.0217 gm.

What is electroplating?

The process of using electrodeposition to coat an object in a layer of metal is called electroplating .

As we know that, Q = I * t

=0.270 * 72

= 19.44 C

Here Q is quantity of electricity , I is current in amperes = 0.270 A (given)

t is time in seconds (72.0 sec)

As 96500 Coulomb of electricity electrolyzes 1 mole of Ag

then,19.44 C of electricity deposits,

=1/96500 * 19.44

= 0.000201 moles of Ag

Mass of Ag is = number of moles * molar mass

= 0.000201 * 108

= 0.0217 gm

Thus, mass of pure silver deposited on a metal object made into the cathode of the cell is  0.0217 gm.

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______ in a white, crystalline solid at room temperature that is soluble in water, has low melting and boiling points, and held together through covalent bonds. a. Baking soda b. Butter
c. Granulated sugar
d. Table salt

Answers

At room temperature, granulated sugar is a white, crystalline solid that is soluble in water, has a low melting and boiling point, and is bound together by covalent bonds.

What types of solids have crystal lattices?

Crystalline solids are made up of atoms, polymers, or ions that are arranged in a predictable, three-dimensional pattern. Solids that have a crystal structure include quartz, diamonds, sodium chloride, and others.

What are the characteristics of a crystalline solid?

Solids with crystalline structures have conventional geometries. In these kinds of solids, atoms, molecules, or ions are arranged in long-range order throughout the 3-dimensional network of a crystal. Sodium chloride, quartz, diamond, etc. are few examples. Crystalline solids' characteristics.

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a. Consider the reaction
Fe(s) + 2HCl(aq) --> FeCl2(s) + H2(g)
Using standard thermodynamic data at 298K, calculate the entropy change for the surroundings when 2.13 moles of Fe(s) react at standard conditions.
S°surroundings = ____ J/K
b. Consider the reaction
C2H4(g) + H2O(g) --> CH3CH2OH(g)
Using standard thermodynamic data at 298K, calculate the entropy change for the surroundings when 2.23 moles of C2H4(g) react at standard conditions.
S°surroundings = ___ J/K

Answers

i) Entropy change for the surroundings when 2.13 moles of Fe(s) react at standard conditions is 52.89 K/J.

According to Hess law, “at constant temperature, heat energy changes (enthalpy – ΔHrec) accompanying a chemical reaction will remain constant, irrespective of the way the reactants react to form product”.

Heat of reaction = sum of heats of reaction of products - sum of heats of reaction of reactants or

ΔH0rxn = ∑n×ΔHf0(products)−∑n×ΔHf0(reactants)

= ΔHf0 FeCl2(s) + ΔHf0 H2(g) - (ΔHf0 Fe(s) + 2 *ΔHf0 HCl(aq))

= (-341.8 KJ + 0 KJ)-(2*-167.2 KJ+1*0 KJ)

= -7.4 KJ

the enthalpy change when 2.13 moles of Fe(s) react at standard conditions = 2.13(-7.4) KJ = -15.762 KJ

ΔS°surroundings = -ΔH0rxn /T

= -(-15.762 KJ)/298 K

= 52.89 J/K

ii) Entropy change for the surroundings when 2.23 moles of C2H4(g) react at standard conditions is 341.2 J/K.

According to Hess law,

ΔH0rxn = ∑n×ΔHf0(products)−∑n×ΔHf0(reactants)

= ΔHf0 CH3CH2OH(g) - (ΔHf0 C2H4(g) + ΔHf0 H2O(g)))

= (-235.1 KJ)-(52.3 KJ+(-241.8 KJ)

= -45.6 KJ

the enthalpy change when 2.23 moles of C2H4(g) react at standard conditions = 2.23(-45.6) KJ = -101.688 KJ

ΔS°surroundings = -ΔH0rxn /T

= -(-101.688 KJ)/298 K

= 341.2 J/K

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Identify the relationship in each of the following pairs. Do the drawings represent constitutional isomers or stereoisomers, or are they just different ways of drawing the same compound? If they are stereoisomers, are they enantiomers or diastereomers? CH3 CBr and C-CH3 CH3CH2 CH3CH2 CH2OH CH OH (b) HOH and HOH CH2OH CH2OH and он OH HC CH2OH CH20H and CH3 CH3 and CH3

Answers

The given pairs of compounds are the stereoisomers and in it they are  enantiomers.

A chemical molecule's atoms can be organized in a variety of ways. Isomerism is the name given to this phenomenon. Isomers are molecules with the same chemical formula but distinct atom configurations.

The nomenclature system used to identify enantiomers is called the R-S system. According to the Cahn-Ingold-Prelog priority rule scheme, which assigns a priority to each of the chiral center's substituents, this method labels the chiral center R or S. On the basis of atomic mass, the priority is determined. Stereoisomers make up the given pair of molecules.

The given pair of compounds are the  R and S enantiomers.

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a graphic organizer that illustrates the reactants, products and locations for each of the major stages of cellular respiration: a) glycolysis b) pyruvate oxidation c) krebs cycle d) oxidative phosphorylation

Answers

Krebs cycle is a visual organizer that shows the components, locations, and sites for each of the main phases of cellular respiration.

The second crucial stage of oxidative phosphorylation is the Krebs Cycle, often known as the citric acid cycle. The Krebs cycle converts the energy from the smaller, 3-carbon glucose molecules produced by glycolysis into electron carriers, which are then utilised in the electron transport chain to create ATP. The majority of living things utilize glucose as their main fuel source, but they first have to break it down and store the energy in ATP and other molecules. The mitochondria contain the Krebs cycle. The Krebs cycle's processes contribute electrons and protons to a variety of electron carriers inside the mitochondrial matrix.

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Dinitrogen tetroxide decomposes according to N2O4(g)=2NO2(g). In a certain experiment, N2O4(g) at an initial pressure of 0.554 bar is introduced into an empty reaction container; after equilibrium is established, the total pressure is 0.770 bar. A quantity of NO2(g) is injected into the container and the total pressure jumps to 0.906 bar. Calculate the total pressure after equilibrium is reestablished.

Answers

The total pressure after equilibrium will be 0.854 atm calculated  help of kp.Since the Kp depends on the individual partial pressures of the components in mixture.

N₂O₄ ==> 2NO₂

initial..0.554.........0

change....-p..........+2p

equil....0.554-p.......2p

Total Pressure at equilibrium  = 0.770;

therefore,

0.554-p+2p = 0.770 and this allows  to calculate Kp.

NO₂ is injected to make  the Ptotal equals to 0.906 bar

so that makes 0.906-0.770 = 0.136 bar  being injected.

It would make a new ICE chart with the NO₂ start = 0.136 + old equilibrium pressure of  N₂O₄ = old equilibrium and recalculate the new pressures using the Kp from the first part. You know of course that the reaction will be shifted to  left side

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A 22.02 ml solution containing 1.615 g of magnesium nitrate is mixed with a 28.64 ml solution containing 1.073 g of sodium hydroxide. a precipitate forms. calculate the total concentration of ions remaining in solution after the reaction is complete. assume that the volumes are additive.

Answers

The total concentration of ions remaining in the solution is 0.0007 M.

To solve this problem, we need to determine the concentration of both magnesium nitrate and sodium hydroxide before the solutions are mixed, and then use the reaction between magnesium nitrate and sodium hydroxide to determine the concentration of ions remaining in solution after the reaction is complete.

To calculate the total concentration of ions remaining in solution after the reaction is complete, we need to first determine the number of moles of each reactant present before the reaction occurs. To do this, we can use the molar mass of each compound to convert the mass of each compound to moles.

First, we can calculate the number of moles of magnesium nitrate present in the 22.02 mL solution:

Number of moles of magnesium nitrate = (1.615 g magnesium nitrate) / (148.32 g/mol magnesium nitrate) = 0.0109 moles magnesium nitrate

Next, we can calculate the number of moles of sodium hydroxide present in the 28.64 mL solution:

Number of moles of sodium hydroxide = (1.073 g sodium hydroxide) / (40.00 g/mol sodium hydroxide) = 0.0268 moles sodium hydroxide

Now that we know the number of moles of each reactant, we can use the balanced chemical equation for the reaction between magnesium nitrate and sodium hydroxide to determine the number of moles of each product that will be formed:

Magnesium nitrate + Sodium hydroxide -> Magnesium hydroxide + Sodium nitrate

1 mole magnesium nitrate + 1 mole sodium hydroxide -> 1 mole magnesium hydroxide + 1 mole sodium nitrate

Since we have 0.0109 moles of magnesium nitrate and 0.0268 moles of sodium hydroxide, the number of moles of each product that will be formed is also 0.0109 moles for magnesium hydroxide and 0.0268 moles for sodium nitrate.

Finally, we can use the number of moles of each product and the total volume of the solution to calculate the concentration of each product in the solution. The total volume of the solution is 22.02 mL + 28.64 mL = 50.66 mL.

The concentration of magnesium hydroxide in the solution is:

(0.0109 moles magnesium hydroxide) / (50.66 mL solution) = 0.0002 M magnesium hydroxide

The concentration of sodium nitrate in the solution is:

(0.0268 moles sodium nitrate) / (50.66 mL solution) = 0.0005 M sodium nitrate

The total concentration of ions remaining in the solution after the reaction is complete is the sum of the concentration of the magnesium ions and the concentration of the sodium ions. The concentration of the magnesium ions is 0.0002 M, and the concentration of the sodium ions is 0.0005 M, so the total concentration of ions remaining in the solution is 0.0002 M + 0.0005 M = 0.0007 M.

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giant stars... are close to exhausting their supply of helium. are close to exhausting their supply of hydrogen. have already exhausted their supply of hydrogen. have already exhausted their supply of helium.

Answers

Giant stars' hydrogen reserves are almost depleted. High-mass stars are defined as having a mass of at least 8 times that of the Sun. These stars are of type O and B, and as we already observed, they only exist for a brief period of time on the Main Sequence, on the order of 10 million years.

Nevertheless, they go through very similar life phases to the low mass stars. Remember that these phases for low mass stars are: hydrogen burning in the core during the Main Sequence; when the hydrogen in the core is spent; the star starts hydrogen burning in a shell around the degenerate helium core; and the star moves up the Red Giant Branch.Extreme pressure increases the temperature to 100 million degrees, where helium burning is feasible, when the hydrogen fuel runs out. As the helium in the core is exhausted, the star starts burning helium in a shell around an inert carbon core while moving back up the H-R diagram to become a Red Supergiant. Suddenly, at the helium flash, the degenerate core starts burning helium and the star moves toward (but not quite to) the Main Sequence again.

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b. Explain why manganese (IV) oxide is not able to conduct electricity when it
is in solid form but can conduct when it is in molten or solution form. You
should use ideas about bonding and structure in your answer.
Total for Question 4-4 marks
[3 marks]

Answers

Answer:

manganese dioxide, is a solid chemical compound that is typically not able to conduct electricity when it is in its solid form. This is because the structure of solid manganese dioxide is made up of a network of strong covalent bonds between the manganese and oxygen atoms. These covalent bonds are very stable and do not allow electrons to flow freely through the compound, which is necessary for the conduction of electricity.

However, when manganese dioxide is melted or dissolved in a solvent, the covalent bonds are broken and the electrons become more mobile. This allows the electrons to flow more freely through the compound, enabling it to conduct electricity.

In summary, manganese (IV) oxide is not able to conduct electricity in its solid form due to the strong covalent bonds between its atoms, which do not allow electrons to flow freely. However, when it is in its molten or solution form, the covalent bonds are broken and the electrons become more mobile, allowing the compound to conduct electricity.

Write a balanced overall reaction given the unbalanced half‑reactions. Ca ⟶ Ca2+ Na+ ⟶ Na

Answers

Answer:

Ca + 2 Na+ + 2 e- ⟶ Ca2+ + 2 Na

Explanation:

The overall reaction is balanced by including the electrons that are transferred in the reaction. The balanced overall reaction is:

Ca + 2 Na+ + 2 e- ⟶ Ca2+ + 2 Na

This reaction shows the transfer of two electrons from calcium to sodium ions, which results in the formation of calcium ions and sodium atoms. This reaction is electrically neutral, with the same number of positive and negative charges on each side of the reaction. Overall, the reaction represents the transfer of electrons from one element to another, resulting in the formation of new chemical species.

draw the organic product(s) of the following reactions including stereochemistry when it is appropriate. h2 lindlar catalyst

Answers

Draw the organic by product(s) of the subsequent reactions, taking stereochemistry into account as necessary. The formula for H2 lindlar catalyst is:

Lindlar catalyst for CH3-C-CH2-CH2-CH3 + H2 - CH2 - CH2 - CH2 - CH3

| |

H H

The bond is hydrogenated into double bonds using the lindlar catalyst. Alkynes that include triple bonds are converted into alkenes that contain double bonds using the H2 + lindlar catalyst. Alkenes do not react with the H2 + lindlar catalyst. The following is a description of the H2 + lindlar catalyst reaction:

Using the Lindlar catalyst, the reaction goes from CH3-C to C-CH2-CH2- CH3 and then to CH3-C=C-CH2-CH2- CH3 and then to hexyne.

                                      H H  

(2) Hexene

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which of the following can help initiate a sluggish grignard reaction? (select all that apply)a. waterb. a crystal of iodinec. a few drops of preformed grignard reagentd. a sonicatorb. a crystal of iodinec. a few drops of preformed grignard reagentd. a sonicator

Answers

a crystal of iodine, a sonicator, a few drops of performing Grignard reagent.

What is the purpose of a sonicator?

Sonicators are high-frequency (20 kHz) devices that agitate particles in liquids using ultrasonic radiation.These tools are used to speed up a wide range of procedures, including sample preparation, cell disruption, cleaning, degassing, and mixing.

The sonicator principle is what?

Small vacuum bubbles are formed in the liquid when low pressure is applied because this causes high-intensity ultrasonic waves to be created.In the high-pressure cycle, bubbles disintegrate as soon as they reach their saturation point.Cavitation is the name of this procedure.

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assuming that the uranium atoms are spherical and that their metallic radius is such that their size is determined by the unit cell dimensions (i.e., equal size spheres that touch each other as constraint by the unit cell) determine the metallic radius of uranium atoms at room temperature.

Answers

Uranium is often known as a silvery-white metal in the actinide series of the periodic table. Uranium is softly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years.

Uranium has the giant atomic weight of the primordially occurring elements and Its hardness is about 70% higher than that of lead and slightly lower than that of gold or tungsten.

Uranium is often found at low levels (a few ppm – parts per million) in all rocks, soil, water, plants, and animals (including humans). generally, Uranium occurs also in seawater and can be recovered from the ocean water.

Significant concentrations of uranium occur in some elements such as uraninite (the most common uranium ore), phosphate rock deposits, and other minerals.

Uranium is a chemical element with atomic number 92 which means there are ninety-two protons in its nucleus.

There are a total number of protons in the nucleus is called the atomic number of the atom and is denoted by the symbol Z. The total amount of electrical charge of the nucleus is, therefore, +Ze, where e (elementary charge) equals 1,602 x 10-19 coulombs.

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