The pre-partition salicylic acid solution (not mixing with chloroform) serves a second propose to act as a standard for linear regression analysis.
What is salicylic acid?
The chemical formula for salicylic acid is HOC6H4CO2H. It is a colorless, bitter-tasting substance that serves as both an aspirin precursor and metabolite (acetylsalicylic acid). It is a plant hormone that has been classified as an experimental teratogen by the EPA's Toxic Substances Control Act (TSCA) Chemical Substance Inventory. The word for willow tree in Latin is salix. Some anti-acne products contain it as an ingredient. Salicylates are the name for the salts and esters of salicylic acid.
The pre-partition salicylic acid solution (not combining with chloroform) acts as a benchmark for linear regression analysis in addition to serving as a comparison to the post-partition salicylic acid solution.
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each of the following reactions shows a solute dissolved in water. classify each solute as a strong electrolyte, a weak electrolyte, or a nonelectrolyte. x(s)→x(aq) cd(aq)⇌c (aq) d−(aq) yz(s)→y (aq) z−(aq) pq(aq)→p (aq) q−(aq) r(l)→r(aq)
Each of the following reactions shows a solute dissolved in water and is classified as a strong electrolyte, a weak electrolyte, or a nonelectrolyte.
Define strong electrolyte, non-electrolyte and weak electrolyte:
The complete dissociation of a substance into ions when dissolved in aqueous solution is known as strong electrolyte.
Whereas the substance that does not isolate completely into ions is known as non-electrolyte.
On the contrary, a substance that partially dissociates into ions when dissolved in its aqueous solution is known as weak electrolyte.
(a) x(s) → x(aq)
It is a non-electrolyte as no dissociation of ions is taking place here.
(b) cd(aq) ⇌ c+ (aq) + d−(aq)
This reaction is in equilibrium state and partial dissociation of ions takes place, Thereofre, it is a weak electrolyte.
(c) yz(s)→y+(aq) + z−(aq)
This reaction is in non-equilibrium state and hence complete dissociation of ions taking place here. Thus, it is a strong electrolyte.
(d) pq(aq) → p+(aq) + q−(aq)
pq is a strong electrolyte as it dissociate complete into ions.
(e) r(l)→r(aq)
It is non-electrolyte as it does not produce ions.
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Can someone help me solve this? I’ve been stuck on it for days and it’s due tomorrow. Thanks :)
1. (i) Magnesium 1
No of protons: 12
No of electrons: 12
No of neutrons: 12
Mass number: 24
(ii) Magnesium 2
No of protons: 12
No of electrons: 12
No of neutrons: 13
Mass number: 25
(iii) Magnesium 3
No of protons: 12
No of electrons: 10
No of neutrons: 13
Mass number: 25
2. Magnesium 1: Atom
Magnesium 2: Atom
Magnesium 3: Ion
3. Isotopes of Magnesium
4. Heaviest magnesium isotope: ²⁶ Mg
5. 5.1) Charge = -12
5.2) Charge = +12
6. Relative charge of magnesium 3 is +2
Magnesium has 3 stable isotopes. Isotopes have same number of proton.
If the proton and electron is equal in an element, it is an atom. If it differs, it becomes an ion.
The relative charge of a proton is +1 and the relative charge of an electron is -1.
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Suppose a scientist wants to create a pool of rna molecules that are 40 nucleotides long and contain every possible combination of bases. What mass of rna nucleotides is needed to synthesize the pool of rna molecules?
If a scientist wants to create a pool of RNA molecules that are 40 nucleotides long and contain every possible combination of bases. The mass of RNA nucleotides needed to synthesize the pool of RNA molecules is 440 molecules of all four RNA.
All four RNA nucleotides combined will be required to create a pool of RNA molecules which containes every RNA molecule. This is due to that each position is to be occupied or filled by any of the four nucleotides which are-
Adenine (A) Thymine (T) Guanine (G) Cytosine (C).An RNA nucleotide consist of three parts, they are -
ribose sugar with five carbon, phosphate molecule, One of four nitrogenous bases such as adenine, guanine, cytosine or uracilThousands of ribonucleotides gets initiated before the process of transcription occurs and the mRNA is formed. 100,000 or more proteins in the human body are synthesized from a different RNA nucleotides.
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here’s another question for you: at room temperature, liquid water has a density of about 1 g/cm3, while that of liquid mercury is about 13.6 g/cm3. check all of the ways that the molecular model could account for the difference.
Mercury's molecules have more mass, Mercury's molecules are spaced closer together
We can argue that density is directly related to mass since density is defined as the ratio of an object's mass to its volume, i.e., the higher an object's mass, the higher its density. Mercury's density will be higher than that of liquid water since it has a higher mass than that of water. Since the molecules of mercury are more tightly spaced from one another than those of a liquid, the latter's molecules exhibit lower forces of attraction. Because an object's force of attraction is directly inversely proportional to its mass, the stronger the force of attraction, the larger the mass, which results in a high density.
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4. As you add neutrons to the simulation, which number is changing on the isotope symbol?
The chemical symbol
The atomic number
The number of protons
The mass number
Search up isotope phet simulation to answer
What is the future of Nanoparticles in medicine
Answer:
nanoparticle cancer drugs could act like biological missiles that destroy tumors while minimizing damage to healthy organs
Indicate the oxidation state for each of the following:
phosphorus in P₂H₂
carbon in H₂C₂O4
chromium in CrO²-
P2H2 has an oxidation number of +1. In P2H2, the oxidation
number of H is -1
H2C2O4 Oxidation State - Oxalic AcidC has an oxidation number of +3 in H2C2O4. O has an oxidation
number of -2 in H2C2O4. H2C2O4 has an oxidation number of +1.
CrO2 Oxidation State - Chromium(IV) OxideCrO2 has an oxidation number of +4.
Explain oxidation?The oxidation state, also known as the oxidation number, is an atom's hypothetical charge if all of its bonds to other atoms were fully ionic.
The sum of the oxidation states of all the atoms in an ion equals the ion's charge.
A substance's more electronegative element is given a negative oxidation state. The one that is less electronegative is given a positive oxidation state.
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1. If the Moxie's tank has an initial pressure of 50 atm in the winter, what will be *
the pressure in the summer?
O 5.88 atm
22.6 atm
O 110.5 atm
ہے
In the summer, the Moxie's tank will be under 110.5 atm of pressure.
The right answer is C.
What is the law of pressure?The pressure law states that for a given quantity of gas, provided the volume stays constant, the pressure exerted on the container's sidewalls is exactly proportional to the absolute temperature of the gas.
Briefing: The mathematical formulation of this rule is
[tex]\frac{P_1}{T_1 }= \frac{P_2}{T_2}[/tex]
where
The initial pressure is P1.
P2 is the ultimate pressure.
T1 is the initial temperature.
T2 is the final temperature.
As the gas's temperature rises, so does its pressure.
The pressure within the Moxie's tank will thus be greater than 50 atm throughout the summer since summer temperatures are higher than winter ones.
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identify the number of molecules in the chemical formula for Butane 5C4H10
Answer:
Explanation:
C=20
H=50
What did you include in your response? Check all that apply.
DNA is twisted in a double helix.
DNA is wrapped around proteins.
DNA is condensed into chromosomes.
This “packaging” is what allows a six-foot-long DNA molecule to fit into the nucleus of a tiny cell. What did you include in your response? Check all that apply.
DNA is twisted in a double helix.
DNA is wrapped around proteins.
DNA is condensed into chromosomes.
This “packaging” is what allows a six-foot-long DNA molecule to fit into the nucleus of a tiny cell.
In the response, the correct options are:
DNA is twisted in a double helix.DNA is wrapped around proteins.DNA is condensed into chromosomes are all correct.What is a DNA?Deoxyribonucleic acid (DNA) can be defined as a polymer composed of two polynucleotide chains that coil around each other to form a double helix carrying genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses.
Although DNA is exceptionally long and therefore may seem impossible to fit in nucleus, it is contained in very a condensed and folded form. This form is called the DNA complex, chromatin. When paired with other genetic material such as histone proteins, this leads to creation of chromosomes.
The DNA stores instructions for making other large molecules, called proteins. These instructions are stored inside each of your cells, distributed among 46 long structures called chromosomes. The chromosomes is built up of thousands of shorter segments of DNA, called gene
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Answer:
In the response, the correct options are:
DNA is twisted in a double helix.
DNA is wrapped around proteins.
DNA is condensed into chromosomes are all correct.
a person’s blood alcohol (c2h5oh) level can be determined by titrating a sample of blood plasma with a potassium dichromate solution. the balanced equation is 16 h⁺ (aq) 2 cr2o7²⁻ (aq) c2h5oh (aq) ⟶ 4 cr³⁺ (aq) 2 co2 (g) 11 h2o (l) if 35.46 ml of 0.05961 m cr2o7²⁻ is required to titrate 28.00 g of plasma, what is the mass percent of alcohol in the blood?
The percent of alcohol in the blood is found to be 0.1739%.
Given:
Volume of [tex]Cr_2O_7^{2-}[/tex] = 35.46mL
Molarity of [tex]Cr_2O_7^{2-}[/tex] = 0.05961M
Molar mass of [tex]C_2H_5OH[/tex] = 46.07g/mol
Mass of Plasma = 28.00g
The balanced equation for the titration reaction of percent of alcohol in the blood is:
[tex]16H^+ (aq) + 2Cr_2O_7^{2-} (aq) + C_2H_5OH (aq) \rightarrow 4Cr^{3+} (aq) + 2CO_2 (g) + 11H_2O (l)[/tex]
To find:
Percent of alcohol in the blood = ?
Formula:
Percent of alcohol in the blood = Mass of alcohol / mass of plasma x 100
Calculations:
The No. of moles of [tex]Cr_2O_7^{2-}[/tex] in 35.46 mL of 0.05961 M [tex]Cr_2O_7^{2-}[/tex] are:
35.46 x 0.05961= 2.114 x [tex]10^{-3}[/tex] mol
2:1 is the molar ratio of [tex]Cr_2O_7^{2-}[/tex] to alcohol in the blood ([tex]C_2H_5OH[/tex]).
Therefore, the no. of moles of [tex]C_2H_5OH[/tex] are 1/2 x 2.114 x [tex]10^{-3}[/tex] = 1.057 x [tex]10^{-3}[/tex] mol
The molar mass of alcohol ([tex]C_2H_5OH[/tex]) is 46.07g/mol.
The mass of alcohol corresponding to 1.057 x [tex]10^{-3}[/tex] moles is:
1.057 x [tex]10^{-3}[/tex] x 46.07 = 0.04870g
The percent of alcohol in the blood of 28.00 g plasma is:
(0.04870 /28.00) x 100 % = 0.1739%
Result:
0.1739% alcohol is present in 28g blood plasma.
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the atomic number of an element x is 14 and it's relative atomic mass is 28
To get the number of neutrons use the formula i.e. No. of neutrons=mass number-atomic number. Therefore , 28–14 = 14neutrons.
Which element has a relative atomic mass of 28?Silicon-28 atom is the stable isotope of silicon with relative atomic mass 27.9769265.
How is relative mass determined?By multiplying the proton and neutron counts of the exact isotope that interests you, you may always find the relative mass of an element. For instance, an atom of carbon-12 has a relative atomic mass of 12 due to its composition of 6 protons and 6 neutrons.
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WILL GIVE BRALINLIST
The solution to 1.56 x 65.3211 should have ____ significant figures.
Answer: 3 Figures
Explanation:
Calculate 345.009 g - 23.009 g and give your answer with the appropriate number of significant figures. 322.000 g.
there bud
Based on the Hertzprung-Russell diagram, which statement is true? OA. Main sequence stars with low temperatures tend to have low luminosity. B. Supergiants tend to have high luminosity and high temperatures. OC. Giants tend to be the stars with the highest luminosity. D. Main sequence stars with high temperatures tend to have low luminosity.
Main sequence stars with low temperatures tend to have low luminosity is based on Hertzprung-Russell diagram
What is the Hertzsprung-Russell diagram's main sequence?The bright, hot stars in the image's upper left are the main sequence group, which stretches roughly diagonally to the lower right (dim and cool). In the bottom left are white dwarfs, which are small, faint, and hot. In the top right are giant and supergiant stars, which are big, bright, and cool.
What is the main sequence star H-R diagram trend?Main sequence stars have a wide range of effective temperatures, but because they are brighter at higher temperatures, they normally follow a band from the bottom right to the top left of the diagram. Inside the cores, hydrogen and helium are fusing together.
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Answer: White dwarfs
Explanation: edge2020
Sediments that have been cemented together become igneous rock. True or False?
Sediments that have been cemented together become igneous rock. false
The rock pieces called as sediments dropped from the wind and air to make a layer and this can be buried under other layers of sediments . after a long time sediments that have been cemented together become sedimentary rock. sedimentary rock can change into igneous rock and metamorphic rocks. sediments are pieces of solid material that have been deposited on earth surface. formation of sedimentary rocks begins when weathering and erosion produce sediments. so the statement Sediments that have been cemented together become igneous rock is a false statement.
Thus, Sediments that have been cemented together become igneous rock. false.
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Which of the following has the largest ionic radius?
Group of answer choices
Mg 2+
S 2-
F -
The ion of the element from above which has the greatest ionic radius is S²- ( sulphur ion )
The correct answer choice is option b.
Understanding the ionic radius of a chemical elementIt follows that distance between the nucleus of an ion to that till that point it influence on its electron cloud, is referred to as the ionic radius of an ion of an element. Within the context of this task, the atomic radius of sulphur ion is 184 ppm.
Furthermore more, this periodic trend of elements, that is, the ionic radius decreases across the period but increases down the group.
So therefore, we can correctly deduce from the explanation above that S²- has the largest ionic radius.
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Student Exploration: Determining Density via Water Displacement
Directions: Follow the instructions to go through the simulation. Respond to the questions and
prompts in the orange boxes.
Vocabulary: Archimedes' principle, density, displacement, mass, volume
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
A ship floats by an iceberg as shown.
1. Based on the picture, which object is denser, the
iceberg or the ship?
2. How do you know?
During chemiosmosis, hydrogen ions accumulate in the ______ of the mitochondrion to create a large electrochemical gradient for aerobic cellular respiration.
In the course of chemiosmosis, hydrogen ions build up in the mitochondrion's intramembrane space to produce a significant electrochemical gradient for aerobic cellular respiration.
What is the chemiosmosis procedure?Protons are pumped through specialized channels in the mitochondrial membranes from the inner to the outer compartment during chemiosmosis. A gradient of proton (H+) is created by the pumping. Protons diffuse through a transport protein called ATP synthase to diffuse down the gradient once it has been formed.
How is ATP produced through chemiosmosis?Electrons are transferred from one molecule to another in the electron transport chain, and the energy released during these electron transfers is used to create an electrochemical gradient. The energy held in the gradient is utilized in chemiosmosis to produce ATP.
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Describe how proteins are made, packaged, and transported within the cell?????????????
The proteins are the first to assemble in the organelle called the irregular endoplasmic reticulum and then the proteins are transported by an organelle known as the Golgi bodies.
How proteins are produced and transported within the cell?Protein cargo moves from the ER to the Golgi is modified within the Golgi and is sent to various destinations in the cell, including the lysosomes and the cell surface. The Golgi procedure proteins are made by the endoplasmic reticulum (ER) before getting off them to the cell. All channel proteins and carrier proteins allow solutes to cross the membrane without the use of energy is called passive transport, or facilitated diffusion. These proteins, and specific genes within its DNA must first be transcribed into molecules of mRNA; then, these transcripts must be translated into chains of amino acids, which later folded into fully functional proteins. The organelle that transports proteins is called the endoplasmic reticulum.
So we can conclude that the endoplasmic reticulum is responsible for the production of protein and transported by the Golgi bodies.
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predict the formula and give the name of the binary ionic compound that contains the given elements. write the formula in the first box and the name of the compound in the second box. make sure you spell the name of the compound correctly.
The binary ionic compounds for the given elements are KBr, [tex]CaH_2[/tex] , [tex]Li_3N[/tex], and [tex]AlCl_3[/tex] respectively.
Ionic compounds are neutral substances made of cations, which are positively charged ions, and anions, which are negatively charged ions. The name of the cation is written first, followed by the name of the anion, for binary ionic compounds (ionic compounds that only contain two types of elements).
The ions of two separate elements, one of which is a metal and the other a nonmetal, make up a binary ionic compound. For instance, sodium iodide, or NaI, is made up of iodide ions, or [tex]I^-[/tex] (elemental iodine is a nonmetal), and sodium ions, or [tex]Na^+[/tex] (because sodium is a metal).
The given element pairs for the following binary ionic compounds:
KBr - Potassium Bromide
[tex]CaH_2[/tex] - Calcium Hydride
[tex]Li_3N[/tex] - Lithium Nitride
[tex]AlCl_3[/tex] - Aluminum Chloride
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what type of dinosaur left foot prints?
its a cer graphic organizer
The term "ichnite" refers to preserved footprints, which are a sort of trace fossil and a window into of dinosaurs. They developed similarly to how our imprints do when we walk on squishy surfaces like mud.
What dinosaurs still exist now?Because they descended from the common ancestor of all dinosaurs, birds can be thought of as a living group of dinosaurs. There is no proof, however, that any dinosaurs, such as Tyrannosaurus, Velociraptor, Apatosaurus, Stegosaurus, or Triceratops, are still alive today, with the exception of birds.
Why did dinosaurs die out?Scientists already know that Earth was impacted by an asteroid or maybe a comet off the Mexico. Chicxulub, the subsequent 110-mile/80-kilometer wide crater, is assumed to have been the catalyst for the "impact winter" that wiped out the dinosaurs over a number of decades.
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The separation technique you used in the investigation to make dirty water clear is
:
filtration
crystallization
sedimentation
distillation
The separation technique used to make dirty water clear is filtration.
Filtration is a separation technique that uses a funnel lined with filter paper to hold the solids while allowing the liquid to pass through, separating the components of a combination that contains an undissolved solid in a liquid. Filtration can be carried out cold or hot, under vacuum or by gravity, and with either a Buchner or Hirsch funnel or a straightforward glass funnel. Whether a solid is to be isolated from a mixture or pollutants are to be removed, the precise technique utilized depends on the goal of the filtration.
In the given question it is mentioned that the water is muddy then the one first method to separate is filtration after this it can be followed by distillation by which we can get pure water from it.
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Construct a three‑step synthesis of 3‑bromocyclopentene from cyclopentane. Drag the appropriate items into the bins. Note that each bin should hold only one item, and not all reagents and structures will be used.
The three step for the synthesis of 3-bromocyclopentene are: bromination, reaction with tert-butoxide and at last reaction with ester.
What is 3- bromocyclopentane and how it is prepared in three steps?The first step for the preparation of 3-bromocyclopentane would be bromination : cyclopentane + Br2/hv ----------- bromocyclopentane.The second step would be reaction with potassium tert-butoxide which is obviously a base : bromocyclopentane + (CH3)3CO K+ ----------------------cyclopentene.The third step would be the reaction of cyclopentene with NBS and ROOR to give 3- bromocyclopentene.In organic chemistry we face a lot of organic compounds , some are alkanes, alkenes and alkynes out of which 3-bromocyclopentene is a synthetic compound.To know more about 3-bromocyclopentene visit:
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Find the density in g/cm3 of brass, if 535,000 milligrams occupy a volume of 62.3 cm3.
Answer:
8.59 g/cm3
Explanation:
mass = 535,000 mg = 535,000 x 10^-3 g = 535 g
volume = 62.3 cm3
density = m/V = 535 / 62.3 = 8.58747993579 g/cm3 or 8.59 g/cm3
a 1.502 g sample of primary khp (potassium hydrogen phathlate; molar mass 204.23 g/mol) was weighed out into a 250 ml beaker and diluted with 50 ml of distilled water. several drops of phenolphthalein indicator were added to the solution, which remained colorless. a buret was filled with a solution of approximately 0.5 m sodium hydroxide naoh. the initial volume reading on the filled buret was 4.56 ml. the titrant, naoh, was used to titrate the khp in the beaker with phenolphthalein indicator. when the buret read 22.31 ml, the solution changed from colorless to pink. determine the concentration in m of the standardized naoh.
The process of standardization involves calculating the precise concentration (molarity) of a solution. One type of analytical process that is frequently employed in standardization is titration. A precise volume of one chemical is reacted with a known quantity of another substance in a titration.
The endpoint of a titration is the point at which the reaction is finished. The endpoint is indicated (signaled) using an indicator chemical substance. Phenolphthalein is the indicator utilized in this experiment. Organic compound phenolphthalein is colorless in acidic solution and pink in basic solution.
In this standardization, a sample of potassium acid phthalate (KHP; HKC8H4O4) will be titrated with a sodium hydroxide solution (NaOH) to measure the molarity of the NaOH.
HKC8H4O4 + NaOH -----> NaKC8H4O4 + H2O
(1.502 g KHP)(1 mol / 204.23 g KHP ) = 6.267 x 10-4 mol KHP
(6.267 x 10-4 mol KHP)(1 mol NaOH / 1 mol KHP) = 6.267 x 10-4 mol NaOH
6.267 x 10-4 mol NaOH / 0.02854 L NaOH = 0.0220 M NaOH
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Think of substances that you see around you. At an atomic level, what might a bottle of water look like and how does it
change when they undergo chemical reactions?
Answer:
burning of candle
Explanation:
because a candle is at a solid state when it burn it changes into liquid substance and when it dry it returns to solid
6. Use the simulation to determine what the mass number and the atomic mass (amu) is for the isotope Fluorine-19.What is the biggest difference you see between the two numbers? Explain why these are different use the isotopes and mixtures simulation by phet
7. What is the percent compositions for nature's mix of lithium isotopes? What do you notice about the average atomic mass compare to the mass numbers for these same lithium isotopes? How does this relate back to how the average atomic mass is calculated.
Two stable isotopes of lithium, 6Li and 7Li, make up naturally occurring lithium; 7Li is the more prevalent of the two (92.5% natural abundance).
Explain about Isotopes?
The total amount of protons and neutrons in an atom makes up the mass number. A whole number, that is. The average number of protons and neutrons among an element's natural isotopes is known as the atomic mass. It has decimal form.
The total number of protons and neutrons in an isotope's nucleus is referred to as the mass number. This is due to the fact that each proton and neutron has a mass of one atomic mass unit (amu). You may get the mass of the atom by multiplying the total number of protons and neutrons by 1 amu.
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What is the energy of an ultraviolet photon having a wavelength of 1.18 x 10^8 m?
From the calculations, the energy of the ultraviolet waves is 1.7 * 10^-33 J.
What is the wavelength?The term wavelength has to do with the distance that have been covered by a wave. In this case, we are told that the photon is from the ultra violet portion of the electromagnetic spectrum. The question here is that we should find the energy of the ultraviolet photon having a wavelength of 1.18 x 10^8 m.
Let us now look at the things that we have in the question as the parameters that could be used to solve the problem;
Wavelength of the wave = 1.18 x 10^8 m
Plank Constant = 6.6 * 10^-34 Js
Speed of light = 3 * 10^8 m/s
Now we have that;
E = hc/λ
E = 6.6 * 10^-34 Js * 3 * 10^8 m/s/1.18 x 10^8 m
E = 1.7 * 10^-33 J
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5) Which element is an example of a metalloid?
A) gold
B) helium
C) iron
D) silicon
Please help with the picture above!!
Explanation: First split the compound into individual ions and assign oxidation states. You can give oxidation states with the help of the image provided below. Just cross-multiply the subscript. Every compound is in the format (Cation Anion). You will assign a positive charge to the cation and a negative charge to the anion. The subscript is the number of cations or anions present.