The amount of heat released from the system as the pentane cools is 67.5kJ.
What is the formula for calculating heat absorbed by pentane?To determine the heat released from the system as the pentane cools, we need to consider the heat absorbed or released during each of the phase changes (vaporization and fusion) as well as the heat absorbed or released during the temperature change of the substance in each phase.
The heat absorbed or released during a phase change can be calculated using the enthalpy of vaporization (AHvap) or enthalpy of fusion (AHfus) and the number of moles of substance undergoing the phase change.
The heat absorbed or released during a temperature change can be calculated using the specific heat of the substance and the number of moles of substance and the temperature change.
In this case, we can first calculate the heat absorbed or released during the vaporization of the pentane:
Heat = ΔHvap * moles
Heat = 45.3 kJ/mol * 144.29 g / (58.12 g/mol) = 102.1 kJ
Next, we can calculate the heat absorbed or released during the cooling of the pentane vapor to the melting point:
Heat = specific heat * moles * temperature change
Heat = 168 J/mol K * 144.29 g / (58.12 g/mol) * (117 - (-84)) K = 68400 J = 68.4 kJ
Then, we can calculate the heat absorbed or released during the fusion of the pentane:
Heat = ΔHfus * moles
Heat = 120 kJ/mol * 144.29 g / (58.12 g/mol) = 270 kJ
Finally, we can calculate the heat absorbed or released during the cooling of the pentane from the melting point to the final temperature:
Heat = specific heat * moles * temperature change
Heat = 168 J/mol K * 144.29 g / (58.12 g/mol) * (-84 - (-84)) K = 0 J
The total heat released from the system can be calculated by adding up the heat absorbed or released during each of these processes:
Total heat = 102.1 kJ + 68.4 kJ + 270 kJ + 0 kJ = 440.5 kJ
The correct answer is therefore D) 67.5 kJ.
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Using the count data and observational data you acquired, calculate the number of CFUs in the original sample. Number of CFUs - 54000000 CFUS You discover that the plate you selected had only been inoculated with 0.1mL of the dilution instead of 1ml. Using the count data and observational data you acquired, re-calculate the number of CFUs in the original sample. Number of CFUS = 1540000000 CFUS
The number of CFU's in the original sample is 540000000.
The colony forming unit stands for (CFU) is a measure of viable colonogenic cell numbers in CFU/mL. CFU's are an indication of the number of cells that remain viable enough to proliferate and form small colonies.
CFU/ml = [Number of colonies ][Dilution factor]/Volume of cultre plate
In the question , Volume of cultre sample=0.1 ml
Dilution factor = Final volume/Sample volume
= 0.1 ml/1 ml
= 0.1 ml
Let x be the number of colonies,
CFU =[x 1/10] /0.1 =540000000
x = 540000000 × 0.1 × 10
= 540000000
Therefore CFU in the original sample = [540000000 × 1/10 ] /0.1
= 540000000
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a proton is created in the electron transport chain where protons move from the to the through an enzyme called where is made.
In the electron transport chain, a proton is produced as protons flow from one to the other through an enzyme called ATP synthase.
ATP synthase works in the F1 sector to create ATP from ADP and inorganic phosphate (Pi). Energy from a gradient of protons that pass through the inner mitochondrial membrane from the intermembrane gap into the matrix through the Fo section of the enzyme makes this possible.
During the process of cellular respiration, an enzyme called ATP synthase produces adenosine triphosphate (ATP) directly. The primary energy molecule used by cells is ATP.
The process of making ATP entails the movement of electrons from the intermembrane region back to the matrix via the inner membrane. The pH difference between the membrane's two sides is caused by the transport of electrons from the matrix to the intermembrane gap (about 1.4 pH units).
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moseley's work led to the realization that elements with similar properties occurred at regular intervals when the elements were arranged in order of increasing
Moseley's work led to the realization that elements with similar properties occurred at regular intervals when the elements were arranged in order of increasing atomic number.
The periodic table was arranged by atomic mass, and this nearly always gives the same order as the atomic number. However, there were some exceptions (like iodine and tellurium, see above), which didn’t work. Mendeleev had seen that they needed to be swapped around, but it was Moseley that finally determined it.
He fired the newly-developed X-ray gun at samples of the elements, and measured the wavelength of X-rays given. He used this to calculate the frequency and found that when the square root of this frequency was plotted against atomic number, the graph showed a perfect straight line. He’d found a way to actually measure atomic number.
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he presence of n atoms in a compound can sometimes be inferred from the molecular mass. match the number of n atoms to the effect on the molecular mass
The presence of n atoms in a compound can sometimes be inferred from the molecular mass, even number of N atoms but 0 N atoms.
A nucleus and one or more electrons connected to it make up each atoms. The nucleus is composed of one or more protons and a sizable number of neutrons. Only the most common kind of hydrogen has no neutrons. Each neutral or ionized atom makes up a solid, liquid, gas, or type of plasma. Atoms are very small, with an average diameter of 100 picometers. They are so small because of quantum phenomena that classical physics cannot accurately predict their behavior, as it would be the case, for instance, if they were tennis balls. More than 99.94% of the mass of an atom is found in its nucleus. Protons have a positive electric charge, while electrons have a negative charge and neutrons have no electric charge. If the protons and electrons in the atom are equal, the atom is electrically neutral. If an atom has more electrons than protons, it has an overall charge of either positive or negative; these atoms are referred to as ions.
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3. Name the following organic compounds
Answer:
Hydrocarbons. Alkanes. Alkenes. Alkynes.
Cyclic Hydrocarbons.
Aromatic Hydrocarbons.
Alcohols.
a compound with a molecular formula c8h15clo3 has the following 1h nmr spectrum. the ir spectrum shows a strong absorption at 1800 cm-1. which of the following structures is consistent with this spectrum?
Simply counting the amount of unique hydrogens on one side of the symmetry plane will give you the number of signals these molecules emit in a 1H NMR spectrum.
How are 13c NMR peaks recognized?
No two carbons exist in the same environment exactly. The peak at slightly over 50 must be a carbon with a single bond connecting it to an oxygen. The two carbons at either end of a carbon-carbon double bond must be responsible for the two peaks at 130. The carbon in a double bond between carbon and oxygen peaks at just around 170.
Which chemical shift range does the 13c NMR have?
Compared to protons, organic molecules' 13C nuclei's chemical shifts can range up to 200 ppm, while protons' shifts only reach 12 ppm (see Table 3 for a list of typical 13C-NMR chemical shifts).
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. BONUS QUESTION (1 point): Diazonium salt can be used to synthesize Aryl-Aryl coupling product below: NaOH H3C -NEN H- H3C- + H3C CI нас Which building block below would you use to synthesize the following cross- coupling products using Pd-catalyzed cross-coupling named reactions. Hint 1: Look up what Suzuki, Heck, Negishi, and Stille reactions are. Hint 2: Red bold bond is the disconnecting point. (a) Suzuki Cross-Coupling: (0.25 points) CF3 [Pd] + H3CO (b) Heck Cross-Coupling: (0.25 points) CN [Pd] who HzCÓ CN (c) Stille Cross-Coupling: (0.25 points) Hzco [Pd] 300 F C CH3 (d) Negishi Cross-Coupling: (0.25 points) нсо CH3 [Pd] wo CH3
To synthesize the following cross- coupling products using Pd-catalyzed cross-coupling named reactions.
Step 1: Suzuki Cross-Coupling reaction
It is a reaction between Organo halides and organoborane. The given reaction is as follows,
A catalytic cycle including three primary stages governs the Suzuki coupling mechanism. Oxidative addition, transmetalation, and reductive elimination are the three methods.
The oxidative addition of aryl halides to the complex is the first step, which results in intermediate 1, Pd(2) species. In transmetalation, an organoborane molecule combines with intermediate 1 under the influence of a base to produce intermediate 2. Reductive elimination is then used to produce the required product and regenerate the original species.
Step 2: Heck Cross-Coupling reaction
It is a reaction between Organohalide and Olefins. It is also a substitution reaction of alkene. The reaction is as follows,
CN pd Rocha = H₂CO.CN Х 4 / осн, Ne Ne (х= cl, % ) Bor.
The Heck reaction uses palladium as a catalyst and a base to cross-couple an organohalide with an alkene to produce a substituted alkene. The reaction starts with the aryl halide being oxidatively added to the palladium, followed by coordination and migratory insertion of the olefin into the palladium.
Bond rotation relieves steric strain by placing the two groups trans to each other, and subsequent -hydride elimination results in a trans final product. The catalyst is regenerated through base-mediated reductive elimination.
Step 3: Stille Cross-Coupling reaction
It is a coupling reaction between organohalide and oregano stannane. The reaction is as follows,
H2C0 [Pd],[]。 f,с H₂Cg sn R / си» R (x = (1, Bo, 2, 074) o x clI, R= alkyl group) eg -CH₂ , Et -Bu ehe
The organic reaction of an organohalide with an organostannane compound to yield the coupled product using a palladium catalyst is known as the Stille cross-coupling reaction. The oxidative addition of the organohalide to the complex to generate the Pd(2) complex is the first step in the mechanism.
The R group of the organostannane reagent replaces the halide anion on the palladium complex in transmetalation with the organostannane. The final coupled product is then produced by reductive elimination, which regenerates the palladium catalyst and allows the catalytic cycle to restart.
Step 4: Negishi Cross-Coupling reaction
It is a coupling reaction between organohalide and organozinc.
The reaction is as follows, 40 CH 3 не -Х x 4 4 с нс 5 е = х = с15 т, ), ( ал, мм) OTJ, GA pd1 Осн; Pe CH₃ -on) Hica сN,
The Negishi cross-coupling process, which uses a palladium or nickel catalyst, is an organic reaction in which an organohalide reacts with an organozinc molecule to produce the coupled product.
The oxidative addition of the organohalide to the Pd(0) to produce a Pd(II) complex is the first step in the palladium-catalyzed process. The R group of the organozinc reagent subsequently substitutes the halide anion on the palladium complex, resulting in a zinc(II) halide salt. The final coupled product is then produced by reductive elimination, which regenerates the catalyst and restarts the catalytic cycle.
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Question 4
How many moles of CuSO4 are there in 7.87 x 1024 molecules of CuSO4?
Answer:
8058.88
Explanation:
7.87 x 1024=8058.88
you got this bro!
make a rule that helps you predict the forumlas of ionic compounds formed between metal and nonmetal elements
The rule that helps you predict the formulas of ionic compounds formed between metal and nonmetal elements is by determining the charges of the ions by using the periodic table. Metal elements tend to lose electrons and form positive ions, while nonmetal elements tend to gain electrons and form negative ions.
Determine the ratio of cations to anions required to produce a neutral compound. This can be accomplished by finding the lowest common multiple of the charges of the ions and utilizing that as the ratio. Write the formula taking up symbols of the elements and the suitable ratio of ions. For example, if the cation is magnesium and the anion is chloride, the formula for the compound would be MgCl₂, implying that there are two chloride ions for every magnesium ion.
But this is simply a general rule and there may be exceptions.
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Single-strand-binding proteins are necessary for: O ALL OF THESE O initiating DNA replication O priming DNA inhibiting double-helix formation O identifying nucleotides O polymerizing DNA
Single-strand-binding proteins are necessary for: inhibiting double-helix formation
Deoxyribonucleic acid is a polymer composed of polynucleotide chains that coil spherical each one-of-a-kind to form a double helix. The polymer includes genetic instructions for the development, functioning, boom and replica of all seemed organisms and lots of viruses.
In all dwelling things, DNA is vital for inheritance, coding for proteins, and offering instructions for life and its tactics. Human cells commonly consist of 23 pairs of chromosomes, for a complete of forty six chromosomes in every cell.
Most DNA is positioned within the cell nucleus. Mitochondria are the structures within cells that convert the power from meals right into the shape that cells can use.
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How many moles of H2SO4 are in a 25ml sample of 0.25M H2SO4?
Answer:
Hope this answer will help you.
Explanation:
As we know that
morality =moles/vol.in liter
in order to no.of moles we simply multiply molarity with volume which is 0.025L
0.25×0.025=0.00625moles
26. In Rutherford's alpha scattering experiment, a few of the alpha particles aimed at a thin gold foil bounced back because
A. The positively charged alpha particles were repelled by a negatively charged nucleus in the gold atom.
B. The positively charged alpha particles were repelled by a positively charged nucleus in the gold atom.
C. The negatively charged alpha particles were repelled by a negatively charged nucleus in the gold atom.
D. The negatively charged alpha particles were attracted to a positively charged nucleus in the gold atom.
Answer:
A
Explanation:
The positively charged alpha particles were repelled by a negatively charged nucleus in the gold atom.
Using the thermodynamic information in the ALEKS Data tab; calculate the standard reaction free energy of the following chemical reaction: P4010 (s)+6H,0 () _ 4H,PO4Round your answer to zero decimal places_
The standard reaction free energy of the following chemical reaction is -399.4 KJ/mol.
Define standard reaction free energy.
The distance between the standard-state and equilibrium is determined by the standard-state free energy of reaction. Go is influenced by the reaction's temperature.
The chemical reaction is given as,
P4O10 (s)+6H2O (l) _ 4H3PO4(s)
Standard free energy change,
ΔG rxn = ∑ ΔG (product)- ∑ ΔG (reactant)
ΔG rxn = 4 x ΔG (H3PO4)- [ΔG (P4O10) + 6 ΔG (H2O)
ΔG rxn = 4 (-1124.3) - [-2675.2 + 6 (-237.1)]
ΔG rxn = -399.4 KJ/mol
Therefore, the standard reaction free energy of the following chemical reaction is -399.4 KJ/mol.
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part c.1. the water level in the co2(g)-collection cylinder is higher than the water level outside the cylinder. see margin drawing. (page 188).
Because a higher water level translates into a lower atmospheric pressure, the wet CO2 gas pressure is lower than the atmospheric pressure.
Wet CO2 gas pressure is therefore lower than air pressure outside the collection cylinder if the water level inside is higher than the water level outside.
Why does gas accumulate over water?By displacing water, a gas created during a chemical reaction can be collected. As a result of being gathered over water, the gas is not pure and is instead combined with water vapor. By deducting the contribution of the water vapor, the amount of the desired gas can be calculated using Dalton's law.
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Cells that have a high level of reactive oxygen species would need which of the following pathway(s) to be active in order to reduce the high level of oxidative stress?
A. Oxidative Phase of PPP
B. Non-Oxidative Phase of PPP
C. Glycolysis
D. Gluconeogenesis
More NADPH --> oxidative phase
non-oxidative phase--> fructose 6- bisphosphate and 3 glyceraldehyde
gluconeogensis: convert it to fructose 6- bisphosphate and 3 glyceraldehyde to make even more glucose
Since the cell needs high levels of NADPH. The pathways that would provide the most NADPH would be the oxidative phase of PPP, the non-oxidative phase of PPP producing fructose 6-phosphate and glyceraldehyde 3-phosphate, and gluconeogenesis using fructose 6-phosphate and glyceraldehyde 3-phosphate to produce more glucose 6-phosphate that can be used to generate more NADPH.
The oxidative segment PPP is the pathway(s) to be active in order to reduce the high level of oxidative stress.
This segment is made up of two irreversible steps: Step 1: Glucose-6-phosphate is oxidized to shape lactone. NADPH is produced as a byproduct of this response as NADP +begin superscript, plus, cease superscript is decreased as glucose-6-phosphate is oxidized.
More NADPH --> oxidative phasenon-oxidative segment--> fructose 6- bisphosphate and three glyceraldehydegluconeogensis: convert it to fructose 6- bisphosphate and three glyceraldehyde to make even extra glucose
Since the mobileular wishes excessive ranges of NADPH. The pathways that might offer the maximum NADPH will be the oxidative segment of PPP, the non-oxidative segment of PPP generating fructose 6-phosphate and glyceraldehyde 3-phosphate, and gluconeogenesis the usage of fructose 6-phosphate and glyceraldehyde 3-phosphate to provide extra glucose 6-phosphate that may be used to generate extra NADPH.
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Using the ionization constants (ka and kb) tables in your online textbook's appendix, calculate the ph of a 1.32 m ammonium chloride (nh4cl) aqueous solution. (enter the numerical value in the space provided below.)
The pH of the 1.32 M ammonium chloride (NH4Cl) aqueous solution is 9.12.
To determine the pH of the 1.32 M ammonium chloride (NH4Cl) aqueous solution we need the values of ionization constants (ka and kb) and the concentration of ammonium chloride which is 1.32 M.
The values of ionization constants (ka and kb) are
Ka of NH4+ = 5.6 x 10-10
Kb of Cl- = 1.0 x 10-7
Calculate the concentrations of NH4+ and Cl- in the solution.
NH4+ = 1.32 M
Cl- = 1.32 M
Calculate the equilibrium concentrations of H3O+ and OH- using the ionization constants.
Ka = [H3O+][NH4+]/[NH4+]
[H3O+] = Ka x [NH4+] = (5.6 x 10-10)(1.32) = 7.37 x 10-10
Kb = [OH-][Cl-]/[Cl-]
[OH-] = Kb x [Cl-] = (1.0 x 10-7)(1.32) = 1.32 x 10-7
Calculate the pH of the solution.
pH = -log[H3O+] = -log(7.37 x 10-10) = 9.12
The pH of the 1.32 M ammonium chloride (NH4Cl) aqueous solution is 9.12.
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all of the following statements are true except some enzymes change shape and regular molecules either activators or inhibitors. enzymes are carbohydrates. enzymes are very sensitive
The invalid option is Enzymes are carbohydrates. Because the enzymes are generally proteins.
Enzymes are the protein molecules. Enzymes are the biological catalyst which can increases the rate of reaction by lowering the activation energy for the reaction by combining with the reagents but without undergoing any permanent chemical change.
Enzymes lower the activation energy necessary for the reaction to occur. This allows the reaction to happen more quickly than it would without an enzyme present.
The enzyme is not destroyed during the reaction and can be reused.
So, we can state that the wrong answer is enzymes are carbohydrates.
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if the manipulation of the iv is weakened and all else is held constant, which of the following would be expected to occur?
Option ( a) is correct because In F ratio, numerator is the mean sum of square due to regression or controlled variable. And of we manipulate or weakened the independent variable, then numeretor is also weekened or week. if the manipulation of the iv is weakened and all else is held constant
Regression analysis is a statistical method for connecting a dependent variable to one or more independent (explanatory) variables. A regression model can demonstrate whether variations in the dependent variable are related to variations in one or more explanatory variables. Regress is derived from the Latin word "regressus," which means to return (to something). Regression is the method that, in this way, enables "going back" from muddled, difficult-to-interpret data to a clearer and more significant model.
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consider the fictional case of the incredible shrinking man. if he shrinks proportionately to 1/10 his original height, his weight will be multiplied by question 11 options: 0.1 0.001 0.0001 0.01
The final weight of the shrinking man will be reduced by 1/10 of its original weight.
Given that is a fictional shrinking man shrinks proportionately to 1/10 his original height.
Let's assume that the weight to be W.
W = mg
m = ρV {ρ is density}
⇒ W = ρVg
Consider the body to be cylinder of radius r and height h,
W = πr²ρgh
Then, the initial weight will be,
W = πr²ρgh
After shrinking weight is,
W' = πr²ρgh/10
Then,
W'/W = {πr²ρgh/10}/{πr²ρgh}
W'/W = πr²ρgh/10 x 1/πr²ρgh
W'/W = 1/10
W' = W/10
Hence, the final weight will be reduced by 1/10 of its original weight.
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Propranolol is metabolized to a number of metabolites, the primary metabolite in man being napthoxylactic acid: Utilizing your knowledge of drug metabolism principles, describe the metabolic reactions involved.
Initial metabolism of propranolol occurs primarily through three pathways: glucuronidation (17%), side chain oxidation (20%), and ring oxidation (around 33% of dosage).
A beta blocker is a category of medication that includes propranolol. Propranolol functions similarly to other beta blockers by altering how your body reacts to certain nerve impulses, particularly those in the heart. It lowers your heart rate and makes it simpler for your heart to flow blood throughout your body.
Infants, children, and adults without diabetes may also experience low blood sugar as a result of this medication. This is particularly probable following extended periods of exercise or if you have kidney issues. Propranolol should not be taken by anyone who has asthma or other respiratory issues. Your asthma may deteriorate as a result.
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which of the following foams has the capability of re-covering any gaps created by fire fighters walking through and disturbing the foam layer
Foams have the capability of recovering any gaps created by firefighters walking through and disturbing the foam layer is Aqueous film-forming foam
Fire suppressants like aqueous film-forming foam (AFFF) are used to put out flammable liquid fires like fuel fires.
AFFF is frequently employed in fire fighting apparatus, shipboard and land-based facility fire suppression systems, and fire training facilities. According to the amount of water it is mixed with, AFFF is often sold as a concentrate and is referred to as "3%" or "6%" (Type 3 or Type 6, respectively).
To avoid long-term harmful effects on human health or the environment, containment and cleanup may be necessary when AFFF is used, discharged, or released into the environment.
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during his honeymoon in switzerland, james joule is said to have used a thermometer to measure the tempera- ture difference between the water at the top and at the bottom of a waterfall. take the height of the waterfall to 9.81 m s . suppose that when the ball hits the ground, assuming that all the potential energy change mg dh of a mass m of water is used to heat that water by the time it reaches the bottom, calculate the temperature differ- ence between the top and the bottom of a waterfall 100 meters high. take the specific heat capacity of water 21 21 tobe4.18jk g .
The temperature difference between the top and the bottom of a waterfall 100 meters high. take the specific heat capacity of water to be 4.18 J/K g . is the 0.234 K.
Given that :
Acceleration to gravity = 9.81 m/s²
specific heat capacity = 4.18 J / K g = 4180 J/ K g
difference in height = 100 m
the temperature difference is given as :
ΔT = ( g × Δh ) / c
where ,
ΔT = temperature difference
g = acceleration to gravity
Δh = difference in height
c = specific heat capacity
ΔT = ( 9.81× 100 ) / 4180
ΔT = 0.234 K.
the temperature difference is 0.234 K.
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calculate the energy of activation in kj/mol from the following plot 140 140,000 224.37 none of these
The activation energy is the bare minimum of energy required for compounds to undergo a chemical reaction in physics and chemistry.
The rate constant of a reaction at various temperatures can be used to calculate the activation energy. from Arrhenius Law With two known temperatures and a rate constant for each temperature, the activation energy can also be determined directly. If the rate constant is known, we can use the Arrhenius equation to get the activation energies, and vice versa. A chemical reaction's activation energy can be calculated by comparing rate constants between two temperatures. The Arrhenius equation can be used to determine it. The bare minimum additional energy needed by a reactive molecule to transform into a product is known as activation energy.
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Write the balanced chemical equation for the following metallurgical reaction:
When millerite, an ore containing solid NiS, is roasted in the presence of oxygen, sulfur dioxide gas and a solid oxide of nickel are produced. In the reaction, nickel does not change oxidation state.
The balanced equation is mentioned below and the oxidation state of nickel is not change.
What is reaction ?
In a chemical reaction, bonds within reactant molecules are broken and new bonds are established within product molecules to create a new material.
What is oxygen ?
Since oxygen has an atomic number of 8, it is represented by the letter O in its formal chemical formula and has eight protons in its nucleus. All additional flavours, scents, and colours are absent from oxygen while it is at normal temperature. Nature may include molecular oxygen.
NiS is roasted in presence if oxygen (O2) to produce Sulfur dioxide (SO2) gas and solid nickel oxide (NiO)
the oxidation state of the Ni in the NiS is +2 and it does not changes means in the oxide of nickel the oxidation state of the Ni is +2 therefore the oxide is NiO(s)
so the balanced molecular reaction equation is as follows
2NiS(s) + 3O2(g) ----- > 2NiO(s) + 2SO2(g)
Therefore, the balanced equation is mentioned above and the oxidation state of nickel is not change.
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Question 3 (6 points)
Magnesium metal reacts quantitatively with oxygen to give magnesium oxide, MgO. If 5.00 g of Mg and 5.00 g of O2 are allowed to react, what weight of MgO is formed, and what weight of which reactant is left in excess?
Question 4 (6 points)
Mr.T thinks the windows need cleaning (instead of preparing his lesson), (What a mistake!). So instead he starts cleaning his office because it is a disaster. He pulls out the ammonia (NH3) and gets to work. It takes him 5 hours!! During that time he decides to do a little chemistry, because he doesn't want to fall behind. He weighs his bottle of ammonia before (32.3g) and after (30.7g) he cleans. Using this information, he calculates how many atoms are present in the ammonia he used during cleaning.
Question 5 (6 points)
Mr.T keeps getting in trouble for not cleaning his plate completely after supper every night. He argues that it is because there is water-insoluble compounds on his plate so the water won't clean it. Being the cheeky chemist that he is he comes up with a method to make carbon disulfide, a natural solvent for water-insoluble compounds like fats, oils, and waxes. He is going to make millions!! The unbalanced reaction is shown below. When 27.5 g of carbon reacts with 235 g of sulfur dioxide, what mass of carbon disulfide can Mr.T make? Balance the following equation and use it to determine the limiting reagent in order to answer the problem.
To produce MgO, two moles of Mg are required for one mole of oxygen gas. The number of moles of O₂ in 5 g is 0.15 and needs 0.31 moles of Mg. But there is only 0.20 moles of Mg in 5 g. Hence, 0.11 mole of oxygen goes excess.
What is magnesium oxide?Magnesium oxide is formed by the reaction of Mg metal with oxygen gas as written below:
[tex]\rm 2Mg + O_{2} \rightarrow 2 MgO[/tex]
Mass of Mg = 24 g/mol
number of moles in 5 g = 5/24 = 0.20
mass of oxygen = 32 g/mol
number of moles in 5 g = 5 /32 = 0.156
one mole of oxygen gas needs 2 moles of Mg. Hence, 0.15 moles needs 0.31 moles. There is only 0.20 moles. Hence Mg is the limiting reactant. And oxygen goes excess by 0.11 moles.
Two moles of Mg produces 2 moles of MgO. Hence, 0.208 moles produces 0.20 moles or 8.32 g of MgO (molar mass- 40 g/mol).
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g during alcoholic fermentation, pyruvate is converted into acetyl coa and carbon dioxide. pyruvate is ultimately converted into ethanol and carbon dioxide. pyruvate is oxidized to acetaldehyde. pyruvate is ultimately converted into acetaldehyde and carbon dioxide.
The fermentation of ethanol is a two-step procedure.The initial transformations of pyruvate (pyruvic acid) are to carbon dioxide & acetaldehyde.
What causes pyruvate to turn into ethanol?The answer is "yes," or "no."Pyruvate molecules are used in the fermentation process (more particularly, the alcoholic fermentation) to create ethanol.Alcohol dehydrogenase and pyruvate decarboxylase are the extra enzymes at play.
How does fermentation make ethanol?Yeast is a single-celled microbe that is fed to the slurry during fermentation.As yeast break down glucose, a biological process known as fermentation takes place.Yeast receives energy from glucose.Consequently, ethanol is created.
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An atom of the isotope bromine-80 consists of how many protons (p), neutrons (n), and electrons (e)? a) 45p, 35n, 45e b) 45p, 45n, 35e c) 35p, 45n, 35e d) 35p, 35n, 45e e) none of the above
An atom of the isotope bromine-80 consists of protons (p) = 35 neutrons (n) = 45 and electrons (e) =35. So option c is correct.
Calculation of number of protons and electrons as mentioned in the question will be as follows
For Br - 80
Z=35 and A = 80
A = mass number
Z = number of protons
As it is a neutral species, so
number of protons = number of electrons = z = 35
Calculation of number of neutrons
We know, Mass number (A) = number of protons (Z)+ number of neutrons (n)
So, number of neutrons =A−Z =80 − 35 = 45
So the answer will be
p=35
e−= 35
n= 45
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Electron affinity is defined as the quantitative measurement of the energy change that results from adding a new electron to a neutral atom or molecule in the gaseous state. The more negative the electron affinity value, the higher an atom’s affinity for electrons.The energy of an atom is stated when an atom loses or gains energy through chemical reactions that cause the loss or gain of electrons.
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Answer:
the creature was actually a dragon.
Electron affinity is defined as the quantitative measurement of the energy change that results from adding a new electron to a neutral atom or molecule in the gaseous state. The more negative the electron affinity value, the higher an atom’s affinity for electrons.The energy of an atom is stated when an atom loses or gains energy through chemical reactions that cause the loss or gain of electrons.
Draw the structure of the product (compound B) with molecular formula C10H10O that is obtained when the compound below is heated with aqueous acid:
molecular formula C10H10O that is obtained when the compound below is heated with aqueous acid is The oxidation of compound [B] results in the formation of compound [C], which is a ketone.
So, compound [B] is a secondary alcohol, and compound [A], from which compound [B] has been generated, is a secondary alkyl bromide. It does not decolorize KK2Cr2O ⟶Ether this is confirmed with BBr /H2, which indicates there is no double bond present. Only one I-group is substituted so the compound is asymmetric. molecular formula is a molecule representation that uses chemical symbols to indicate the types of atoms in the molecule, followed by subscripts to show the number of each type of atom in the molecule. (A subscript is used only when there are multiple atoms of the same type present.)
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medications that were widely available before the 1990s and that are effective in reducing only the symptoms of schizophrenia are called .
The first antipsychotic was chlorpromazine, which was then followed by numerous additional antipsychotics, many of which had different chemical structures, this is the initial method of treating schizophrenia.
The first antipsychotic was chlorpromazine, which was followed by numerous other antipsychotics, many of which had different chemical structures. About a quarter of people who have psychosis only experience one episode. Psychosis is a mental health condition that affects how people perceive or respond to their environment. Other therapies included brain tissue removal (lobotomies). From the 1930s to the 1940s, lobotomies were frequently used to treat schizophrenia, severe anxiety, and depression.
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