When a beaker of ethanoic acid is placed in the refrigerator and mix it with sodium carbonate, its temperature drops down and endothermic reaction take place.
[tex]2CH_{3} COOH + NaCO_{3}[/tex] ⇒ [tex]CH_{3}COONa + NaHCO_{3}[/tex]
This chemical reaction is a reversible reaction.
Similarities:Ethanoic acid and sodium carbonate combine to form an endothermic reaction that results in fizzing as carbon dioxide is released and heat is lost to the environment, making the reaction vessel feel chilly to the touch.
Differences:The difference between adding sodium carbonate to the solution and refrigerating ethanoic acid is that no new substance is created in the former. When the substance is taken out of the refrigerator, it is still ethanoic acid. New chemicals are created in the latter scenario. Because of a chemical process, the material is no longer ethanoic acid.
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Draw plausible electron dot structures for the following substances. Each substance contains only single covalent bonds. A. I2 B. OF2 C.H2S D.NI3.
The plausible electron dot structures of I₂, OF₂, H₂S, NI₃ substances are attached below.
How is an electron dot structured?Lewis dot structures, also known as electron dot structures, are diagrams that show how atoms in a molecule are chemically bonded to one another. They also show how many lone pairs there are in total among all the atoms that make up the molecule.
An electron configuration writing guide. The shell number (n) comes first in the symbols used to represent the electron configuration, followed by the type of orbital and, finally, a superscript that represents the number of electrons in the orbital. Examples include As you can see from the periodic table, oxygen has 8 electrons.
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Chemical Reactions - Problems
4 NH, +5 O, → 4 NO+6H_O
Which of the following are the reactants in the reaction above?
NH,
NO
I
H₂O
Submit v
IT
What is the nuclear symbol for an ion with a charge of +220 protons and 24 neutrons 
Answer:
Hey there! The nuclear symbol for an ion with a charge of +220 protons and 24 neutrons would be written as follows:
220+ 24
The symbol consists of two parts: the atomic number (220+) and the atomic mass (24). The atomic number is the number of protons in the nucleus of an atom, and it is represented by a superscript on the left side of the symbol. The atomic mass is the total number of protons and neutrons in the nucleus, and it is represented by a subscript on the right side of the symbol.
In this case, the atomic number of the ion is 220, which indicates that it has 220 protons in its nucleus. The atomic mass is 24, which indicates that it has a total of 220 protons + 24 neutrons = 244 particles in its nucleus.
________________________________________________________
How do we represent the properties of atoms and ions using nuclear symbols?Nuclear symbols are a way of writing down the important information about atoms and ions in a short and easy-to-read format. They usually consist of two parts: the atomic number and the atomic mass. The atomic number tells us how many protons an atom has in its nucleus, and the atomic mass tells us the total number of protons and neutrons. For example, the nuclear symbol for carbon is 6 12C, which tells us that carbon has 6 protons and 12 particles (6 protons + 6 neutrons) in its nucleus.
How do we determine the number of protons, neutrons, and electrons in an atom or ion?To determine the number of protons in an atom or ion, we can look at its atomic number, which is usually written as a superscript on the left side of the nuclear symbol. For example, if the nuclear symbol for an atom or ion is written as 6 12C, we can tell that it has 6 protons. To determine the number of neutrons, we can subtract the atomic number from the atomic mass. For example, if the atomic mass is 12 and the atomic number is 6, then the number of neutrons is 12 - 6 = 6. To determine the number of electrons, we can just look at the overall charge of the atom or ion. If it is neutral, then it will have the same number of protons and electrons. If it is positive or negative, then it will have more or fewer electrons than protons, respectively.
2 H2 + O2 --> 2 H2O
What mass of water (H2O) will be collected if 20. 0 grams of hydrogen gas (H2) are consumed?
Select one:
179 grams
89. 4 grams
44. 7 grams
358 grams
Answer:
2H2 +O2 - 2H20
4g of H react to give 36g of H20
20g of H gives Xg of H20
cross multiply
4x= 36*20
4x= 720
Xg = 720/4
Xg= 180g approximately
That is A which is 179
Why do halogens get less reactive?
The halogens gets less reactive as we move down the group because the atomic mass will increases and the number of the electrons are increases.
The halogens get less reactive as we move top to bottom in the group in the periodic table as the atomic mass of the group 17 elements that is halogens will increases and as we move from from top to bottom in the periodic table the electrons are added and the number of electrons are increases.
This is reason , that the reactivity of the group 17 elements that is halogens will decreases as we move from top to bottom.
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Consider the following equilibrium: Now suppose a reaction vessel is filled with 0. 0406 atm of nitrogen (N_2) and 5. 97 atm of ammonia (NH_3) at 1126. Degree C. Answer the following question this system: Under these conditions, will the pressure of N_2 tend to rise or fall? rise fall Is it possible to reverse this tendency by adding H_2? In other words, if you said the pressure of N_2 will tend to rise, can that be changed to a tendency to fall adding H_2? Similarly, if you said the pressure of N_2 will tend to fall, can that be changed to a tendency to rise by adding H_2? Yes no If you said the tendency can be reversed in the second question, calculate the minimum pressure of H_2 needed to reverse it. Round your answer to 2 significant digits. Atm
Yes, if we add a lot of H₂, the value of K will start falling, which will cause the reaction to move forward. The minimum pressure of H₂ needed to reverse it is 3.598atm.
Describe pressure.The force applied per area is referred to as pressure.
ΔG° = -RT ln(K)
34000 = 8.314(273 + 1126)ln(K)
ln(K) = 2.9231
K = [tex]e^{2.9231}[/tex] = 18.834
Since the container doesn't contain any H₂ gas, K will therefore start out at infinity. The reaction will move in the opposite direction in order to reach equilibrium. Consequently, the pressure of N₂ will initially rise.
Yes, if we add a lot of H₂, the value of K will start falling, which will cause the reaction to move forward.
The answer is therefore yes.
K = (5.97)²/0.0406(PH₂)³
K = 3.598atm.
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Write a skeleton equation using the step, that shows sulfur burns in oxygen gas to
form sulfur dioxide.
Answer:
Skeleton equation: H2S(g) + O2(g) → SO2(g) + H2O(l)
Explanation:
Where is hydroelectric energy used?
Hydroelectric energy is a renewable form of energy used to generate electricity.
This energy is created by harnessing the power of moving water, typically from rivers and streams, to spin turbines and generate electricity.
Hydroelectric power plants are used to generate electricity for homes, businesses, and cities all over the world.
By utilizing the natural power of water, hydroelectric energy is a clean, safe, and reliable source of energy that helps reduce global carbon emissions. It is also a cost-effective energy source, making it a popular choice for many energy providers.
Hydroelectric energy is one of the most widely used sources of electricity in the world, with many countries heavily relying on it for their energy needs.
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A reaction produces 4.93 L of oxygen, but was supposed to produce 1 mol of oxygen. What is the percent yield
When only 1 mol of oxygen was intended to be produced, a process instead yields 4.93 L of oxygen. The percent yield of the reaction is 493%.
Percent yield is a measure of how much of the desired product is produced in a chemical reaction. It is calculated by comparing the actual yield of a product to the theoretical yield, which is the amount of product that would be produced if the reaction were 100% efficient.
To calculate the percent yield, you can use the formula:
= percent yield
= (actual yield / theoretical yield) x 100%
The theoretical yield of a reaction is calculated by multiplying the number of moles of reactant used by the stoichiometry of the reaction. In this case, the reaction is supposed to produce 1 mol of oxygen, which is the theoretical yield. To calculate the actual yield, we can use the Ideal gas law PV = nRT, where P is the pressure, V is the volume, n is the number of mol. Since we know that V = 4.93 L, we can use this information to find n:
= n
= (PV) / RT
The actual yield is 4.93 L of O2 or 4.93 L of any gas at STP (Standard Temperature and Pressure) is equivalent to 4.93 moles of O2.
Then we can use this information to calculate the percent yield:
= percent yield
= (actual yield / theoretical yield) x 100%
= (4.93 moles O2 / 1 mole O2) x 100%
= 493%
So, the percent yield of the reaction is 493%.
It's important to note that a percent yield of greater than 100% is usually an indication of an error in the measurement or calculation of the actual yield, or it could be an indication that the theoretical yield is incorrect.
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Convert: 9.94 × 10²² molecules NH3 = ___ mol NH3
5.99 x 10⁴⁶
none of these
2.81
6.06
0.165
Answer:
correct answer is 0.165 moles by calculation
What is the mass of 2.30 x 10^24 particles of water, H₂O?
The mass of 2.30 x 10²⁴ particles of water (H₂O) is 60.84 grams.
What exactly is mass defined as?The amount of matter in a particle or object is represented by its mass, which is denoted by the symbol m. In the International System (SI), the kilograms serves as the default unit of mass (kg).
The formula N = n L describes the relationship between a substance's number of particles and number of moles.
n also defined using the equation n = m/M
N = n L
N = m/M L
Then substitute N and L values,
2.30×10²⁴ = m/M × 6.02×10²³
Molar mass of water = 18
2.30×10²⁴ = m/18 × 6.02×10²³
2.30×10²⁴/6.02×10²³ = m/18
3.38 = m/18
m = 3.38 × 18
m = 60.84grams.
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2 points of the water molecule are the paired ______ and _______ electrons from the oxygen atom and ________ electron from each H atom
The other 2 points of the water molecule are the paired _________ electrons of the oxygen atom.
I get what the question is asking and I know general idea of the answer. I just can't for the life of me figure out what exact wording I am supposed to use that will fit these blanks
To solve this we must be knowing each and every concept related to chemical Compound. Therefore, The other 2 points of the water molecule are the paired two electrons from the oxygen atom and one electron from each H atom.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. The other 2 points of the water molecule are the paired two electrons from the oxygen atom and one electron from each H atom.
Therefore, The other 2 points of the water molecule are the paired two electrons from the oxygen atom and one electron from each H atom.
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What is the molarity of a LiOH solution if 15. 5 mL of a 0. 112 M H2SO4 solution is
required to neutralize a 25. 0-ml sample of the LiOH solution?
2LiOH + H2SO4 --> Li + 2H20
Molarity is a measure of the amount of solute that is dissolved in a given amount of solution.
What exactly is Molarity?
Molarity is a measure of the concentration of a solution, defined as the number of moles of a solute per liter of solution. It is typically expressed as moles per liter, or M. Molarity is an important concept in many chemistry and biology applications, as it can be used to determine the amount of a certain element or compound that is present in a solution.
Moles of H2SO4 required to neutralize LiOH = (15.5 mL x 0.112 M H2SO4) / 1000 mL = 0.01728 moles
Moles of LiOH used = 0.01728 moles
Moles of LiOH in 25.0 mL sample = (25.0 mL x Molarity of LiOH) / 1000 mL
Molarity of LiOH = (0.01728 moles x 1000 mL) / 25.0 mL = 0.6912 M LiOH
Hence, the molarity of a LiOH solution is 0.6912 M.
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Calculate each of the following quantities:
A. Volume (ml) of 2.25 M potassium hydroxide that contains 15.0 g of solute enter a 3 significant figure number
B. molarity of 250. ml of solution containing 1.25 moles of glucose
C. volume (ml) of 10.00 M copper(II) nitrate that must be diluted with water to prepare 750.0 ml of a 2.500 M solution (enter to 4 significant figures)
D. Are the following instructions for diluting a 10.0 M solution to a 1.00 M solution correct: "Take 100.0 mL of the 10.0 M solution and add 900.0 mL water"? enter either true or false
(A) Vol. of solvent is 119.8 ml, (B) Molarity (M) of sol. is 5.00 M, (C) V1 of copper nitrate solution is 187.5 ml, (D) The instruction given is false.
(A). To calculate the volume (ml) of a 2.25 M potassium hydroxide solution that contains 15.0 g of solute, we can use the formula:
The unit of measurement for molarity (M) is moles of solute per liter of solvent.
Rearranging the formula to solve for liters of solvent:
Molecularity = moles of solute / liters of solvent (M)
We know that the molar mass of potassium hydroxide (KOH) is 56.1 g/mol. To find the moles of solute, we can divide the given mass (15.0 g) by the molar mass of KOH:
15.0 g / 56.1 g/mol = 0.2679 moles
Now we can plug this value into the formula above:
Liters of solvent = 0.2679 moles / 2.25 M
Liters of solvent = 0.1198 L or 119.8 ml (rounded to 3 significant figures)
(B). To calculate the molarity of a solution containing 1.25 moles of glucose in 250. ml of solvent, we can use the formula:
The unit of measurement for molarity (M) is moles of solute per liter of solvent.
Plugging in the given values:
Molarity (M) = 1.25 moles / 0.250 L
Molarity (M) = 5.00 M
(C). To calculate the volume of a 10.00 M copper(II) nitrate solution that must be added to water to prepare 750.0 ml of a 2.500 M solution, we can use the formula:
M1V1 = M2V2
Where M1 and V1 are the concentration and volume of the original solution, and M2 and V2 are the concentration and volume of the final solution.
We know that the final solution has a volume of 750.0 ml and a concentration of 2.500 M, so we can plug in these values for V2 and M2:
M1V1 = 2.500 M x 750.0 ml
Now we can solve for V1 (the original volume) by rearranging the formula:
V1 = M2V2 / M1
V1 = (2.500 M x 750.0 ml) / 10.00 M
V1 = 187.5 ml (rounded to 4 significant figures)
(D). The instructions "Take 100.0 mL of the 10.0 M solution and add 900.0 mL water" are not correct for diluting a 10.0 M solution to a 1.00 M solution.
To achieve this dilution, you would need to take a smaller volume of the 10.0 M solution and add a larger volume of water, because the final volume should be larger than the starting volume.
For example, you could take 10.0 mL of the 10.0 M solution and add 90.0 mL of water, which would give you a final volume of 100.0 mL and a concentration of 1.00 M. The instruction given above is false.
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Consider a fusion reaction in which a proton fuses with a neutron to form a deuterium nucleus. How much energy is released in this reaction?(The mass of the deuterium nucleus is 2.01355u).
Energy released in the reaction in which a proton fuses with a neutron to form a deuterium nucleus is calculated as 2.234 MeV.
What do you understand by a fusion reaction?In fusion reaction, two light nuclei merge to form single heavier nucleus. The process releases energy because total mass of the resulting single nucleus is less than the mass of two original nuclei. And the leftover mass becomes energy.
form a deuterium nucleus: 1^1H+0^1n⟶1^2H+γ The masses are 1^1H(1.0078u) 0^1n(1.0087u) and 1^2H(2.0141u) the γ -ray photon is massless.
Δm= 1.0078 +1.0087- 2.0141
Energy released = 2.4*10^-3 * 931 MeV
= 2.234 MeV
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You just created the equality 1 fluid oz = 29. 7 mL. Use this equality to determine how many ounces of water will be measured using the measuring cup introduced before Part A when making the cake.
Express your answer numerically in ounces to two significant figures
2 ounces of water will be measured using the measuring cup introducing before part A when making the cake.
Both units (that is, ml and ounces) are equal, meaning they measure the same quantity and can be converted to each other.
Given that:
1fluid oz = 29.7ml
Part A measurements are not shown. Therefore, we will explain using hypothetical values.
Let the amount of water measured with the measuring cup in part A be 10 ml.
The equivalent number of ounces (x) is calculated as follows:
1 fluid oz = 29.7ml
x = 10ml
By using equality
x * 29.7ml = 1 fluid oz * 10ml
By canceling common units
x * 29.7 = 10 fluid oz
Divide both sides by 29.7.
x = 0.3367 fluid oz
Approximate to the nearest half.
x = 0.5 fluid oz
This means that the equivalent amount of water is 0.5 ounces.
What if the measurement is 55mL.
We apply the same steps here also:
x fluid oz = 55ml
x *29.7 = 1 fluid oz * 55 ml
Divide both sides by 29.7
x = 2 fluid oz
This means that the equivalent amount of water is 2 ounces.
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the formula for the selenate ion is seo42−. predict the formula for selenic acid.
Answer:
The formula for selenic acid is H2SeO4.
Explanation:
Selenic acid is an oxoacid of selenium, which means that it contains selenium and oxygen atoms bonded together in a compound that also contains hydrogen atoms. The selenate ion, which has the formula SeO42-, is an ion that contains selenium and oxygen atoms bonded together. Based on these facts, we can predict that the formula for selenic acid will contain selenium, oxygen, and hydrogen atoms.
To determine the specific ratio of atoms in the formula for selenic acid, we can look at the valences of the elements involved. The valence of an element is the number of bonds it can form with other atoms. Selenium has a valence of 6, oxygen has a valence of 2, and hydrogen has a valence of 1.
Since selenium has a valence of 6, it can bond with 6 oxygen atoms. This means that selenic acid will contain at least one selenium atom bonded to 6 oxygen atoms. In addition, selenic acid will contain hydrogen atoms, which can bond with oxygen atoms. Based on these considerations, we can predict that the formula for selenic acid will be H2SeO4, which contains one selenium atom bonded to 6 oxygen atoms and 2 hydrogen atoms.
I need help plssss:(
the question is in the photo
the reaction between strontium hydroxide and chloric acid produces __________.
Nitric acid has the formula HNO3. If there are 3. 55x10^23 atoms of O in the sample, how many moles of nitric acid are there?
Nitric acid has the formula HNO₃. If there are 3. 55x10²³ atoms of O in the sample, the number of moles of nitric acid is 0.589moles.
Define mole.How many moles of a substance are present in a reaction is determined by comparing its mass to the mass of one mole. One mole, or Avogadro's number, is equal to the sample mass divided by the molar mass, or 6.023×10²³ moles. You can calculate the total number of atoms or molecules in a sample by dividing the number of moles by the Avogadro constant. The equation is: Number of Molecules=Atoms or Molecules /6.022×10²³.
1 mole oxygen atom contains 6.02×10²³ atoms
how many moles of oxygen contains 3.55x 10²³atoms
Moles of nitric acid = 3.55x 10²³atoms/6.02 ×10²³atoms
Moles of nitric acid = 0.589moles.
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What causes stress in rocks? and What happens when stress is released?
The molar mass of CCl4 is 153. 81 g/mol How many grams of CCl4 are needed to have 5. 000 mol?
The molar mass of CCl4 is 153. 81 g/mol. '769.0 g' of CCl4 are needed to have 5.000 mol.
What is molar mass?
Molar mass is the mass of one mole of a substance. It is usually expressed in grams per mole (g/mol). The molar mass of a substance is calculated by taking the sum of the atomic weights of all of the atoms in the molecule multiplied by the Avogadro constant (6.022x10^23).
To find the number of grams of CCl4 needed to have 5.000 mol, use the formula:
Mass (grams) = Molar mass (g/mol) x Number of moles
Mass (grams) = 153.81 g/mol x 5.000 mol
Mass (grams) = 769.0 g.
'769.0 g' of CCl4 are needed to have 5.000 mol.
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Transpiration is when a plant releases water vapor through its stomata, which are pours in its leaves and stems. What other process in the water cycle is this most similar to? explain your reasoning.
In addition to respiration, a process known as guttation involves the loss of liquid water from a plant's healthy leaf or stem, mostly through water stomata.
What is the transpiration process?The physiological loss of water . water of water vapor, mostly from the stomata of leaves, but also by evaporation first from surfaces of leaf tissue, flowers, and stems, is known as transpiration.
Why is transpiration necessary to plants?Additionally, by providing evaporative cooling, vegetation transpiration makes a major contribution to the energy balance of the leaf. Additionally, transpiration speeds up the movement of nutrients and water from roots to the shoots. Transpiration occurs when water vapor leaves a plant through the stomata.
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Help me please I have been stuck for some time
Answer:275.4 g Al2O3
Explanation: The mass of Al2O3 formed is 2.7 mol * 102 g/mol = 275.4 g. This is because the molar mass of Al2O3 is 102 g/mol. This means that when 1 mol of Al2O3 is formed, it has a mass of 102 g. Therefore, when 2.7 mol of Al2O3 is formed, it has a mass of 2.7 mol * 102 g/mol = 275.4 g.
Investigating Jessie's Claim
Identifying the Other Reactant
If the container was not empty when Jessie added the chlorine gas, then what could have been inside it? Below is an image
showing the reaction inside the container. There is also a table that lists some of the substances that Dr. Yung keeps in her lab.
The group of atoms that repeat to form each substance, as well as some of the properties of each substance, are included in the
table.
Procedure
1. Use the tokens and the information in the table to determine what the other reactant inside the container could have been.
2. Once you have identified the other reactant, answer the questions below.
Since the reduction potential of ions is different, electrolysis can be used to selectively plate out one of the ions in a mixture. A 1.0 L solution containing 0.101 M NiBr2?aq) and 0.407 M CuBr2aq) is subjected to electrolysis. How much time (in hours) would it take to selectively plate out of the cations at a current of 5.0 A? Express your answer numerically to three sig figs in units of hours.
22.2 seconds will it take to selectively plate out of the cations current of 5.0 Amperes.
E∘cell=E∘cathode−E∘anode it is the formula for finding out the net cell potential of the electrolytic cell. We can write the cell reaction to solve the problem in the following way
1. Write down the (two half) reactions.
2. Balance the (half) reactions (Mass and Charge):
a. Start with elements other than H and O. b. Balance O by adding water.
c. balance H by adding H+.
d. Balancing charge by adding electrons.
(3. Multiply each half reaction to make the number of electrons equal.
4. Add the reactions and simplify.)
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Iron has a BCC crystal structure, an atomic radius of 0. 124 nm, and an atomic weight of 55. 85 g/mol. Compute its theoretical density
Iron has a BCC crystal structure, an atomic radius of 0. 124 nm, and an atomic weight of 55. 85 g/mol. its theoretical density is 7.9 g /cm³.
The molar mass of the iron = 55.85 g/mol
The atomic radius = 0.124 nm
the edge length is given as :
a = (4r) / √3
a = ( 4 × 0.124 × 10⁻⁷ cm ) / √3
a = 2.86 × 10⁻⁸ cm
The density is given below :
density = ( Z × M ) / Na × a³
density = ( 2 × 55.85 ) / (6.023 ×10²³) × ( 2.86 × 10⁻⁸ )
density = 7.9 g/cm³
Thus the theoretical density is 7.9 g/cm³.
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What do these two changes have in common?
an engine using gasoline to power a car
cellular respiration
Select all that apply.
Both are only physical changes
Both converse mass
Both are chemical changes
Both are caused by heating
Answer: Both are only physical changes
Both converse mass
Explanation: the first two ones r correct
What are the chances of the offspring being heterozygous for tall plant?
There are 50% chances of the offspring being heterozygous for tall plant.
Crossing homozygous short tt plants with heterozygous tall Tt plants yields short to tall plants in a 1:1 ratio. So the seed has a 50% chance of growing into a large plant.
Under such conditions, the dominant allele is always expressed and the recessive allele is masked. In this example, the size allele is dominant, so the plant grows.
About 80% of an individual's height is determined by differences in their inherited DNA sequences.
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Suppose you run this reaction in a solvent that dissolves elemental mercury and elemental oxygen. What is the equilibrium-constant expression in terms of molarities for the reaction, using (solv) to indicate solvation.
At 55 °C, the equilibrium constant for this reaction is 6.68. A pharmaceutical chemist prepares 15.0 L of an initial 0.275 M acetic acid and 3.85 M ethanol solution.
Create an equation that can be solved for x by plugging the equilibrium concentrations (expressed in terms of x) into the formula for the equilibrium constant. (d) The equation from subpart (c) is cubic (it bears the formula ax3 + bx2 + cx + d = 0). In general, it is impossible to solve cubic equations in closed form. Indicate the direction (toward product or toward reactants) in which the mixture must change if it is not at equilibrium. The concentrations of SO 2 Cl 2 and SO 2 are 0.108 M and 0.052 M, respectively, in a mixture of the three gases that has reached equilibrium.
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