C₂H₅OH(l) + 3O₂(g) → 2CO₂(g) + 3H₂O(l)
For complete combustion of ethanol, the amount of heat produced as measured in the bomb calorimeter is 1364.4kJ/mol at 25° C . The enthalpy of combustion for the reaction will be -1366.95kJ/mol
The combustion equation can be balanced as follows;
Firstly i had counted all the carbons, hydrogens and oxygens on the reactant sides as follows;
C= 2 H= 6 O= 3
and on the product side as follows;
C= 1 H= 2 O=3
Then I balanced the equation by multiplied the reactants and the products with suitable coefficients.
C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O
Now the given equation is balanced because it has all the reactants and products in same amount as
C= 2 H= 6 O= 7
The same concentration of Carbon, hydrogen and oxygen is present on both reactants and products side.
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two coordination compounds that have the same ligands arranged differently in space around the central metal ion, but are not mirror images of one another, are called
Geometrical isomerism:- When two coordination compounds differ in the arrangement of their ligands in space around the central metal ion, they are said to be geometrical isomers.
What are geometrical isomers?
A geometric isomer is a type of stereoisomerism. It is also known as cis-trans isomerism. Geometric isomerism occurs due to the banned rotation about carbon-carbon double bonds or carbon-carbon single bonds in cyclic compounds.
Geometrical isomerism:- When two coordination compounds differ in the arrangement of their ligands in space around the central metal ion, they are said to be geometrical isomers.
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a 40 l vat contains 30 l of solution that is 5% acid. the solution is being pumped out at 4 l/sec and pure acid is being pumped in at 3 l/sec. assume there is instantaneous, perfect mixing. what is the concentration of acid when the vat is one-fourth full?
The concentration of acid when the vat is one-fourth full is 3%.
What is an acid?
The concentration of acid when the vat is one-fourth full can be expressed as a proportion of acid to the total volume of solution in the vat.
At the start, the vat contains 30 liters of a 5% acid solution. This means that 0.05 * 30 = 1.5 liters of acid is present.
As the solution is pumped out at 4 liters per second, and pure acid is pumped in at 3 liters per second, the total amount of acid in the vat is increasing at a rate of 3 liters per second.
At one-fourth full, the vat will contain 10 liters of solution (one-fourth of the original 40 liter volume).
To calculate the concentration of acid at this point, we need to calculate the total amount of acid present. Since the rate of increase of acid is 3 liters per second, after 10 seconds, the amount of acid present will be 3 * 10 = 30 liters.
Therefore, the concentration of acid when the vat is one-fourth full is 30/10 = 3%.
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with the carbonyl group on the end of a six-carbon chain, the carbohydrate would be classified as a(n)
Aldohexose is the carbohydrate with the carbonyl group on the end of a six-carbon chain.
What are carbohydrates?
All carbohydrates are polyhydroxy aldehydes or ketones, or chemicals that can be broken down to generate such compounds, and they all include carbon, hydrogen, and oxygen atoms. Starch, fiber, the sweet-tasting substances known as sugars, and structural components like cellulose are examples of carbohydrates.
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a 35.0 ml solution of ba(oh)₂ is neutralized with 33.0 ml of 0.350 m hno₃. what is the concentration of the original ba(oh)₂ solution?
Concentration of the original ba(oh)₂ solution is 0.33 M.
What is Concentration?
Concentration in chemistry is defined as the quantity present in a mixture in excess of its total volume. It is possible to distinguish between the four different types of mathematical descriptions: mass concentration, molarity, number concentration, as well as volume concentration. The term "concentration" can be used to describe any type of chemical mixture, but it most often refers to the amount of solutes and solvents in a solution. Osmotic concentration and normal concentration are two variations of the molar (amount) concentration. The term "concentration" or an adjective like "dilute" for solutions with a low concentration as well as "concentrated" for solutions with a high concentration are frequently used in everyday, non-technical language to describe concentration in a qualitative manner.
Explanation:
Here, we have given two solution with their conc. and volume
So, formula used to calculate conc. is
M1V1 = M2V2
let
M1 = molarity of ba(oh)2
V1 = volume of ba(oh)2 used
M2 = molarity of HNO 3
V2 = volume of HNO3 used
Now,
M1 X 35 = 0.35 x 33
M1 = 0.35 X 33 / 35
M1 = O.33
Hence, the concentration of ba(oh)2 is 0.33 M.
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the cell wall stores nutrents water and waste in an plant cell
Answer:large central vacuole
Explanation:
f i start with 1.00 moles of nitrogen gas (n2) and an excess of hydrogen gas (h2) how many moles of ammonia can be produced? (what is the theoretical yield?)
One mole of Nitrogen gas will produce 2 moles of ammonia.
What is the purpose of ammonia?
Ammonia produced by industry is used as fertilizer in agriculture to the tune of 80%. In addition to these uses, ammonia is made into polymers, explosives, textiles, insecticides, dyes, and other chemicals. It is also used to purify water sources.
Can ammonia cause cancer?
Ammonia does not considered to be a cancer-causing substance. Ammonia has not been classified as carcinogenic by the EPA, the Department of Health and Human Services (DHHS), or the International Agency for Research on Cancer (IARC).
Briefing:
Hydrogen+Nitrogen→Ammonia
H2+N2-->NH3
Balancing the equation:
3H2+N2-->2NH3
So in an ideal 100% reaction
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Which type of noncovalent interaction supports the double helix of dna and produces the base pairings a–t and g–c?.
The type of non-covalent interaction between the base pairing of a double helix of DNA molecule is hydrogen bonding.
The nucleic acids are categorized into two types that are as follows:
Deoxyribonucleic acid (DNA)
Ribonucleic acid (RNA)
The pairing of bases occurs in both RNA and DNA molecules. The bases that are present in DNA molecules are guanine, adenine, cytosine, and thymine while the bases that are present in RNA molecules are adenine, uracil, guanine, and cytosine.
In a DNA molecule, the pairing is done in a way that A is always paired with T, while G is paired with C and in RNA the base T is replaced by U. There exist hydrogen bonding between base pair and double helix of DNA molecule, they are weak bond and can be broken down easily.
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given that the solubility reaction for calcium phosphate is ca3(po4)2(s)⇌3ca2 (aq) 2po43−(aq) why does the addition of acid increase the solubility of calcium phosphate?
It lowers the concentration of phosphate ions, shifting the balance to the left.
What does the word "solubility" actually mean?The maximum number of a chemical that will disintegrate in such a solvent at a given temperature is referred to as its solubility. Varying compounds have very high solubility, which is a characteristic of a particular solute-solvent pair.
What's an illustration of solubility?The quantity of solute in one liters of a saturated solution, or solubility, is measured in grams. For instance, their solubility in water at 25 oC might be displayed as 12 g/L. The amount of solute per milliliter of saturated solution is measured by its molar solubility. As an illustration, positive and significant at 1 mol/L at 25 oC.
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which phases are present at the upper triple point? liquid diamond graphite gas which phase is stable at 100 atm100 atm and 6000 k
1. Graphite, liquid and diamond- The upper point where the lines connect is known as the upper triple point.
2. The "gas" phase of the diagram includes the intersection point, which is located at 100 atm and 6000 K. Therefore, at 100 atm and 6000K, the gas phase is stable.
3. The production of liquid carbon would include starting from the lower triple point by raising the temperature and pressure.
What is phase diagram?
A phase diagram depicts how a substance reacts to changes in temperature and pressure in a confined container. A potential system temperature and pressure combination is represented by each point in this graphic. The substance's solid, liquid, and gaseous states are represented by the three sections that make up the diagram.
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2. When offspring inherit all of their DNA from one parent, they
are
Answer:
Fertilization
the enthalpy of neutralization for all strong acid-strong base reactions should be the same within experimental error. will that also be the case for all weak acid-strong base reactions?
No, the enthalpy of neutralization for weak acid-strong base reactions will not be the same as for strong acid-strong base reactions.
This is because weak acids do not react as readily and completely with strong bases as strong acids do, resulting in a lower enthalpy of neutralization. Additionally, the extent of the reaction between a weak acid and a strong base will depend on the relative strengths of the two reactants, as well as the concentrations of the reactants.
Therefore, the enthalpy of neutralization for a weak acid-strong base reaction can vary depending on the specific reaction and the concentrations of the reactants.
Any neutralization reaction between a strong acid and strong alkali actually comes down to the same thing i.e.
H⁺ + OH⁻-------> H₂O,
as all the other ions present are spectator ions and so don't play an active part in the reaction. As the overall reaction is always the same irrespective of the acid or alkali the enthalpy change will also be the same.
If a weak acid is used the enthalpy change will be less exothermic as some of the energy evolved will be canceled out by the energy needed to complete the dissociation of the incompletely dissociated acid during the reaction
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what is pheoby supposed to tell the others? do you agree with this? how is hurston using pheoby? why?
Phenoby is supposed to tell others that, "Telling and giving understanding are two different things".
According to Phenoby mink is so valuable, but coon is not valuable, even though both are fur.
Janie implies that within a short period of time telling would be taken by people simply as passing sentence and would most likely will be forgotten.
On the other hand people's behavior can be changed to the better way of thinking by making people understand about the real fact.
Hence, Phenoby is supposed to say this to others.
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what are the risks involved in using auctions to source malic acid? briefly explain with evidence from the case.
The main risks associated with using auctions to source malic acid from Betapharm include quality risk, price risk, delivery risk, and contractual risk.
1. Quality Control: Betapharm's malic acid was of a lower quality than expected, leading to product recalls and customer complaints. This could lead to financial losses and/or damage to Betapharm's reputation.
2. Price Risk: As the auction process is unpredictable, Betapharm may end up paying more than expected or receive a lower quality of malic acid than expected. This could lead to financial losses and/or damage to Betapharm's reputation.
3. Delivery Risk: Betapharm may not receive the malic acid on time, leading to delays in production and financial losses.
4. Contractual Risk: Betapharm may not have a clear contract in place with the supplier, leading to disputes and potential financial losses.
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you are analysing a molecule with two adjacent and non equivalent groups of hydrogens. group a has 2 hydrogens and group b has 2 hydrogens. how many peaks will group a's nmr signal be split due to spin-spin coupling? express your answer as an integer (x).
Resonance is a way of describing delocalized electrons within certain molecules. Here, the bonding cannot be expressed by a single Lewis formula.
When a nuclei are in an EM radiation with a proper frequency, the nuclei aligned with the field will absorb energy and spin flip. When the spin flip happens, the nuclei are said to in resonance with the field. Thus, this technique is NMR ( Nuclear magnetic resonance).
How to calculate peaks due to spin spin coupling?
In general NMR resonance will split into (n+1) peaks where n is the number of hydrogens on the adjacent atom due to spin spin coupling.
So, for group A, n=3
Therefore, number of peaks in group A's NMR signal =3+1=4
Therefore, 4 peaks is the main answer
A quartret will be formed in 1:3:3:1 ratio.
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this carrier molecule in the etc can bypass the next carrier in the chain and transfer electrons directly to oxygen producing two highly potent cellular toxins-hydrogen peroxide (h2o2) and superoxide radical (o2-). what is this carrier molecule?
This transport molecule is a flavoprotein. Because this carrier molecule in the chain can bypass the following carrier and transmit electrons to oxygen directly, hydrogen peroxide is produced.
Which is a pair of extremely strong cellular poisons. Proteins known as flavoproteins include a nucleic acid derivative of riboflavin. The elimination of radicals that cause oxidative stress, photosynthesis, and DNA repair are just a few of the biological processes that flavoproteins are engaged in. A group of two or more atoms bound together by the attractive forces known as chemical bonds is referred to as a molecule; depending on the context, the term may or may not include ions that meet this requirement.
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Nuclear decay occurs according to first-order kinetics. How long will it take for a sample of radon-218 to decay from 99 grams to 0. 50 grams? the half-life of radon-218 is 35 milliseconds.
It will take, 2.6×10²/ (50 days) for a sample of radon-218 to decay from 99 grams to 0. 50 grams.
What is Nuclear decay?
When an atom's nucleus is unstable and produces radiation on its own, this process is known as nuclear decay. In turn, one or more new elements' nuclei are formed from the original element's nucleus. These progeny nuclei are less energetically unstable and have a smaller mass than their parent nuclei.
For instance, uranium-238 emits an alpha particle as it decays into thorium-234.
Therefore, It will take, 2.6×10²/ (50 days) for a sample of radon-218 to decay from 99 grams to 0. 50 grams.
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what is the acidic level of a 100 liter tank thats 12% acid poured into a 50 liter tank that's 0% acid
The acidic level of liter tank is 8%.
Principle -
The reason this occurs is due to the large amount of energy released in the hydration reaction of sulfuric acid ions. Do not believe that heat comes from dissociation, as the dissociation of acids, bases, and salts always consumes energy. The energy is released from subsequent hydration. The energy released in this case will be absorbed by the small amount of water you are adding. As a result that water will splash out of the vessel carrying along with it particles of acid.In 50-LITRES of solution, there are 10 L of pure acid. After that, add "V" litres of water.10 is therefore equal to (50 V) x 8/100.Calculations-
So 10= 4 8V/100.
8V/100 = 10-4= 6.
V is therefore 6 x 100/8, 600/8, or 75 liters.
The percentage of acid decreases to 8% after adding 75 litres of water to the acid solution.
percent of acid in 125 liters of acid solution, which would contain 10 liters of pure acid.= 10/125 x 100 = 8%.
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the amount and the concentration of a salt solution is given. how much salt would you get if you evaporated all water from this solution?
If you evaporated all the water from this solution, you would receive 28 g and 3.4 g of salt; this is the quantity and concentration of a salt solution.
Are saline and salt water the same thing?
But the salt water found in the ocean is not the same as the bag of medicinal saline at the neighborhood hospital. Sodium chloride (table salt) and filtered water are used to make medical saline.
Can we consume salt water?
Seawater, in particular ocean water, contains a lot of salt and is not healthy to drink. Since we were designed to drink fresh water, drinking seawater can make us feel more dehydrated. In addition to making you thirstier, drinking salt water can seriously harm your body.
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What happens to the chemistry of the seawater as more co2 is absorbed into the oceans?.
The planet's PH decreased, thereby making the water there increasingly acidic.
Why does seawater include compounds?There are numerous distinct chemicals in seawater. Because when freshwater in water evaporates and salt is left behind, several of these chemicals can be seen. Pure substance made up water and oxygen is called water, or H2O.
Is seawater a type of chemical solution?Rainwater and dissolved chemical substances combine to become seawater. A great solvent is water. Juices that dissolve other compounds are known as solvents. Numerous solutes are present in the majority of the earth's water, which includes the moisture in oceans, pools, rivers, and ponds.
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a container with 3.00 moles of gas has a volume of 60.0 l. with a temperature at 400.k, what is the pressure in atm? your answer should have three significant figures (round your answer to two decimal places). use r
The pressure of the gas inside the container is 1.6 atm. .This is calculated by the ideal gas law.
Ideal gas law states that the pressure of ideal gas is directly proportional to the absolute temperature of the gas. The ideal gas law also called the general gas equation. This is the equation of state of a hypothetical ideal gas. It is a good approximation of the behavior of many gases under many conditions . The expression for ideal gas law is,
PV = nRT
where, P is the pressure of the gas
V is the volume of the gas
n is the number of moles of the gas
T is the temperature of the gas
A container with 3.00 moles of gas has a volume of 60.0L with a temperature at 400 K. To find the pressure of the gas we have to apply all these value in ideal gas law.
n = 3.0 moles
V = 60.0 L
T = 400 K
From PV = nRT,
P = n RT / V
= (3.0 mole) (0.0821 L-atm. /K-mole)(400 K) / 60.0L
= 1.642 atm.
= 1.6 atm.
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how does the number of atoms in a 27.5-gram zinc ring compare to the number in a nickel ring of the same mass?
The number of atoms in a 27.5-gram zinc ring compared to the number in a nickel ring of the same mass contains 1.08 times more atoms than 27.5g of zinc.
You need to convert the masses of zinc and nickel to no. of moles by using
Moles = mass/Relative Atomic Mass
Then you can calculate the number of atoms knowing that 1 mole of any substance contains the Avogadro Constant number of particles (atoms or molecules usually).
So , no. if moles of zinc = 27.5g/65.3
= 0.42 moles.
Since 1 mole contains 6.023 x 10²³ atoms, then 0.15 mole contains (6.023 * 10²³) x 0.42 atoms
= 2.5 10²³ atoms.
Similarly for nickel, no. of moles = 27.5/ 58.6
= 0.46 moles.
This contains (6.023 x 10²³) x 0.46 atoms.
= 2.7 x 10²³ atoms.
So 27.5g of nickel contains 2.7 x 10²³/ 2.5x 10²³ more atoms than 27.5g of zinc.
Thus, 27.5 g nickel contains 1.08 x more atoms than 27.5g of zinc.
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what volume of dinitrogen pentoxide gas can be synthesized from 2.54 l of nitrogen gas and 1.83 l of oxygen gas
2N2 + 5 O2 → 2 N2O5 Because there is more N2 than what would be required to complete the reaction (1.83 x (2/5) = 0.732 liter of N2), O2 is the limiting reactant and N2 is in excess. (2 mol N2O5 / 5 mol O2) x (1.83 L O2) = 0.732 L N2O5
What is the Gay-Lussac equation?Gay Lussac Law Calculation
The results of fresh experiments by French chemist Joseph Louis Gay-Lussac were published in 1808 along with a generalization that has since become known as Gay-law Lussac's of mixing gases. If the gas volume remains constant, the Kelvin temperature is directly proportional to the gas volume. V 1 T 1 = V 2 T 2.
What is a case of Gay-Lussac legislation?The tire pressure of a car increases after driving. This is due to the air inside the tires heating up as a result of friction (a contact force) between the tires and the road. Gay-Law Lussac states that because the air cannot expand because the tires are effectively fixed-volume containers, the pressure rises.
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in this class, we will learn the bohn oppenheimer approximation which is the basis for treating molecules quantum mechanically. can you enumerate all the terms that generic exist in the full hamiltonian of a molecule?
The Born-Oppenheimer Approximation is the assumption that the electronic motion and the nuclear motion in molecules can be separated. It leads to a molecular wave function in terms of electron positions and nuclear positions.
This mainly involves the following assumptions:
The electronic wavefunction depends upon the nuclear positions but not upon their velocities, i.e., the nuclear motion is so much slower than electron motion that they can be considered to be fixed.
The nuclear motion sees a smeared-out potential from the speedy electrons.
If a Hamiltonian is separable into two or more terms, then the total eigenfunctions are products of the individual eigenfunctions of the separated Hamiltonian terms.
Associated with each measurable parameter in a physical system is a quantum mechanical operator and the operator associated with the system energy is called the Hamiltonian. The Hamiltonian contains the operations associated with the kinetic and potential energies.
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how much heat is required to heat a 18.4 g ice cube from –23.0 °c to –1.0 °c? specific heat of ice is 2.108 j/g °c.
The final temperature at which both become equal is 81.95°C.
What is Specific Heat?
The amount of heat needed to raise a substance's temperature by one degree Celsius in one gramme, also known as specific heat. Typically, calories or joules per gramme per degree Celsius are used as the units of specific heat. For instance, water has a specific heat of 1 calorie (or 4.186 joules) per gramme per degree Celsius.
The French scientists Pierre-Louis Dulong and Alexis-Thérèse Petit showed in the early 19th century that measurements of a substance's specific heat allow one to calculate their atomic weights.
45x0.88x(X-24)=-180×4.184×(X-85)
39.6X-950.4=-753.12X+64015.2
792.72X=6495.6
X=6495.6/792.72
X=81.95°C
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for each pair of compounds, pick the one with the higher boiling point. explain your reasoning. cs2 or cse2
As molecular weight and ionic character increase, boiling point rises as well. Due to its greater mass and ionic character compared to CS₂, CSe₂ has a higher boiling point.
Boiling point definition:A substance's boiling point is the temperature at which it changes from a liquid to a gaseous or vapor state, where the two states are in equilibrium.
The molecular weight, bond type, temperature, and pressure of a substance all affect its boiling point. The 16th group of the oxygen family is where sulfur S and selenium Se both belong.
The covalent character decreases and the molecular weight rises as you move down a group. Se is the heaviest element in the sixteenth group and has a higher molecular weight than the other elements in the group.
Se has a higher boiling point due to its more ionic nature as well. Therefore, CSe₂'s boiling point is higher than CSe₂'s due to its higher mass and ionic character.
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the reaction of 5.45 g of carbon with excess o2 yields 8.10 g of co2. what is the percent yield of this reaction? %
The percent yield of this reaction is 53.05 %.
From the question, we have
Moles of carbon = 5.25/12.011 = 0.437
Mass of carbon dioxide formed = mole*molar mass
= 0.437 mol*44g/mol = 19.228 g.
Percent yield = 10.2/19.228*100%
=53.05%
The percent yield of this reaction is 53.05 %.
mass in physics, quantitative measure of inertia, a fundamental property of all matter. It is, in effect, the resistance that a body of matter offers to a change in its speed or position upon the application of a force.
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f it takes 54 ml of 0.1 m naoh to neutralize 125 ml of an hci solution, what is the concentration of the hci?
The amount of hcl is 0.0432 M. A neutralizing reaction happens after the acid and base are allowed to mix.
What happens during neutralization?
When an acid and a base come together, neutralization takes place, raising the pH to roughly 7. When lime is added to acidic soil to cure and relieve indigestion, for example, it is a practical practice that is used every day. Additionally, neutralization causes an alkali's pH to decrease to around seven.
Which specific neutralization can you cite?
Ans: A neutralizing reaction has numerous uses in daily life. For instance, antacid tablets, which have a fundamental ingredient, help balance gastric acidity. The neutralizing reaction helps to prevent tooth decay in a manner similar to that
Briefing:
volume of NaOH = 54 mL / 1000 = 0.054 L
Molarity NaOH = 0.1 M
Number of moles NaOH :
n = M * v
n = 0.1 * 0.054
n = 0.0054 moles of NaOH
Finally we calculate the number of moles of HCl in the solution from the stoichiometry of the reaction :
HCl + NaOH = NaCl + H₂O
1 mole HCl -------- 1 mole NaOH
?moles HCl ------- 0.0054 moles NaOH
moles HCl = 0.0054 * 1 /1
= 0.0054 moles of HCl
Volume of HCl = 125 mL / 1000 = 0.125 L
M ( HCl ) = n / V
M = 0.0054 / 0.125
= 0.0432 M
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what is the percent ionization of a monoprotic weak acid solution that is 0.181 m? the acid-dissociation (or ionization) constant, ka, of this acid is 2.32×10−11 . percent ionization
The percent ionization of a monoprotic weak acid solution that is 0.181 m the acid-dissociation (or ionization) constant, ka, of this acid is 2.32×10−11 is 1.13x10^-3 T%
The concentration of solution of 0.433 M.
The Ka of the acid is 2.32 x 10~
~and the solution has a concentration of 0.181T M.
We can calculate the hydronium ion concentration by using the equation: |
Ka=[H3O+][A-]/HA-][H3O+]
[H3O+]=[A-]
[H3O+]^2=Ka[HA]
[H3O+]^2= 2.32X10^-11x0.181M[H3O+]=2.049195x10^-6 M
We can then calculate the percent ionization using the equation:
Percent ionisation= [H3O+]/[HA]x100
Percent ionisation= 2.049195x10^-6 M/0.181 M=1.13x10^-3 %
The percent ionization is 1.13x10^-3 %
The percent ionization of a 0.433 M solution of the monoprotic acid is 0.00113%
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The percent ionization of a monoprotic weak acid solution that is 0.181M is 0.001132%
It is given that the concentration of the monoprotic acid is 0.181M and the acid-dissociation (or ionization) constant, ka, of this acid is 2.32×10^−11.To find the percent ionization of a monoprotic weak acid solution, the following steps are to be followed,
[H+] = √Ka x C
On substituting the values of Ka and the concentration of the acid, we get
[H+] = √2.32 x10⁻¹¹ x 0.181
= √0.4199x10⁻¹¹
[H+] = 2.049 x 10⁻⁶M
The dissociation is given by,
AH + H₂O -------> A- + H₃O⁺
[H+] = [A-] = 2.049 x 10⁻⁶M
[HA] at equilibrium is given by
= 0.181-2.049 x 10⁻⁶
=0.180997
The percentage of ionization is given by,
Percentage ionization = [H₃O⁺]/[HA] x 100
On substituting,
Percentage ionization = 2.049 x 10⁻⁶/0.181x100
= 1.132 x 10⁻³%
Percentage ionization = 0.001132%
Therefore the percentage ionization is 0.001132%
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5 g of gold and 25 g of silver are mixed to form a single-phase ideal solid solution. (a) how many moles of solution are there? (b) what are the mole fractions of gold and silver?
The moles of the solution are 0.256 mol. the mole fraction of gold 0.097 and the mole fraction of silver is 0.902.
given that :
mass of gold = 5 g
mass of silver = 25 g
molar mass of gold = 196.9 g/mol
molar mass of silver = 107.8 g/mol
a) moles of gold = mass / molar mass
= 5 / 196.9
= 0.025 mol
moles of silver = mass / molar mass
= 25 / 107.8
= 0.231 mol
total moles of solution = 0.025 + 0.231 = 0.256 mol.
b) mole fraction of silver = 0.231 / 0.256
= 0.902
mole fraction of gold = 0.025 / 0.256
= 0.097
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environmental agents such as nutrition and chemical exposure can alter gene expression by affecting the epigenome. epigenetic changes may also have important effects on behavior phenotypes. which of these examples correctly describe explicit evidence supporting epigenetic traits as heritable?
An example correctly describing explicit evidence supporting epigenetic traits as heritable is DNA methylation.
The epigenome can be impacted by environmental factors like a person's nutrition and exposure to contaminants. When cells divide, epigenetic alterations can be preserved from cell to cell and, in some situations, passed down through the generations. DNA methylation is a frequent epigenetic alteration type.
DNA methylation is an epigenetic modification, meaning it affects DNA without changing its sequence in any way. It modifies a gene's expression during cell differentiation and brings about a heritable alteration. Other potential environmental stressors that can alter epigenetic status include chemical and xenobiotic compounds in water or the atmosphere.
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