What is gluconeogenesis and where does it occur?
The three irreversible steps of glycolysis (name them) must be surpassed by what 3 enzymes/

The international association of artists you're referring to is known as CoBrA, which was active in the mid-20th century.

The group's name was derived from the first letters of the cities Copenhagen, Brussels, and Amsterdam. Coincidentally, this name also refers to a specific type of venomous reptile, the cobra. CoBrA artists focused on organic experimentation and free expression of the unconscious in their art.

Following World War II, the pioneering artists that made up the CoBrA international art movement revolutionized modern art. It was the first really global avant-garde art movement to emerge after World War II. Its participants looked for fresh ways to express themselves that were based on spontaneity and experimentation for modern society.

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The hydroxide ion concentration in the solution is 7.1 x 10^-11 M, which corresponds to answer choice E). To calculate the hydroxide ion concentration in an aqueous solution, we can use the equation:

pH + pOH = 14
We know the pH of the solution is 9.85, so we can solve for the pOH:
pOH = 14 - 9.85
pOH = 4.15
Now that we know the pOH, we can use the equation for the ion product constant of water (Kw) to calculate the concentration of hydroxide ions:
Kw = [H+][OH-]
1.0 x 10^-14 = (H+)(10^-4.15)
Solving for [OH-]: [OH-] = 10^-14/10^-4.15
[OH-] = 7.1 x 10^-11
Therefore, the hydroxide ion concentration in the solution is 7.1 x 10^-11 M, which corresponds to answer choice E).

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It will take 5.17 minutes for the concentration of butadiene to decrease from 1.35 M to 0.39 M.

To calculate the time it will take for the concentration of butadiene to decrease from 1.35 M to 0.39 M, we can use the first-order rate law equation;

Rate = k[A]

where Rate is the rate of reaction, k is the rate constant, and [A] is the concentration of butadiene.

Given; Initial concentration of butadiene ([A]0) = 1.35 M

Final concentration of butadiene ([A]t) = 0.39 M

Rate constant (k) = 1.88 M⁻¹ min⁻¹

We need to find time (t) in minutes.

Using the first-order rate law equation, we can rearrange the equation to solve for time (t);

Rate = k[A]

Rate = -d[A]/dt

k[A] = -d[A]/dt

dt = -1/k × d[A]/[A]

Now we can plug in the given values and solve for time (t);

dt = -1/k × d[A]/[A]

dt = -1/1.88 × d[A]/[A] (substituting k = 1.88 M⁻¹ min⁻¹

dt = -0.5319 × d[A]/[A] (calculating -1/1.88)

Integrating both sides of the equation with respect to time (t) from 0 to t for the concentration of butadiene from [A]0 to [A]t, we get:

∫(0 to t) dt = ∫(-0.5319 × d[A]/[A])

Solving the integral on the left-hand side, we get;

t = -0.5319 × ln([A]t/[A]0)

Plugging in the given values for [tex][A]_{0}[/tex] and [tex][A]_{t}[/tex], we can calculate the time (t);

t = -0.5319 × ln(0.39/1.35)

t ≈ 5.17 minutes

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The volume of HCl that are needed to completely react with 2.500 g of pure calcium carbonate is 16.67 mL.

Generally, hydrogen chloride (HCl), is defined as a compound of the elements hydrogen and chlorine, it is basically a gas at room temperature and pressure. A solution of this gas in water is called hydrochloric acid.

The balanced chemical equation is given as:

CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂

1 mol CaCO₃ = 2 mol HCl

No of mol of caCO3 taken = 2.5/100 = 0.025 mol

No of mol of HCl required = 0.025×2 = 0.05 mol

Volume of HCl required = n/M

                      = 0.05/3

                      = 0.01667 L

                      = 16.67 ml

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We must first convert the amount of atoms of helium to moles in order to solve this issue. This much helium gas can be used by Ngawang to fill about 14 balloons at STP.

Along with liquids, solids, and plasmas, gases are among the four basic states of matter. Gases are made up of atoms or molecules that are constantly moving and spaced far apart from one another. Gases, in contrast to solids and liquids, do not have a set shape or volume and always fill their container to the top.

In addition to other characteristics like density, viscosity, and compressibility, gases can be classified according to their volume, pressure, and temperature. Additionally, they can change physically and chemically through processes including expansion, compression.

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The formal charge on the element carbon for the given structure is 0, hence the correct option for the required question is Option A.

The Lewis structure for CH3-1 is shown in the figure
Then the formal charge  cultivated on the central carbon atom can be evaluated is
Formal charge = valence electrons - non-bonding electrons - 1/2 bonding electrons
The valence electrons of carbon are 4 and it possess three single bonds (6 bonding electrons) and one unpaired electron (non-bonding electron). Hence, the formal charge on the central carbon atom evaluated is
Formal charge = 4 - 1 - (6/2) = 0
Therefore, the formal charge cultivated is 0.

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Based on the information, we can infer that the point of view of the creator of the cleats is "It is worth investing in quality cleats" (option D):

To identify the sentence that refers to the point of view of the advertiser we must read the ad and the options. Once we have done this procedure we can establish what would be the statement that would express the opinion of the advertiser.

In this case, we can infer that the statement that expresses the advertiser's opinion is "It is worth investing in quality cleats" because it highlights that the value of this product is high, but likewise its quality is superior to that of other products from this type.

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To identify the weakest acid among HF, HCl, HBr, and HI, you should consider their acid strength, which is related to the bond dissociation energy.

The acid strength increases as the bond dissociation energy decreases. In other words, the weaker the bond between the hydrogen atom and the halogen atom, the stronger the acid. The bond strength generally decreases down the periodic table, as the size of the halogen atom increases.

Here are the acids in order:

A) HF
B) HCl
C) HBr
D) HI

Given this trend, the weakest acid is HF (A), as it has the strongest bond between hydrogen and the halogen atom (fluorine).

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Monoatomic anions typically have the suffix "-ide." You can determine their charge by looking at their position in the periodic table.

For example, for chloride ([tex]Cl^-[/tex]), the element is chlorine which is in group 17. Subtract 17 from 8, which gives -9. This means chlorine needs to gain one electron to have a full outer shell.

So, the charge of the chloride anion is -1.

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The volume of the container is approximately 24.46 liters.

To determine the volume of 1.0 mol of oxygen gas in a container at 25°C and 101.352 kPa, we can use the Ideal Gas Law formula:
PV = nRT
Where:
P = pressure (in atm)
V = volume (in L)
n = number of moles
R = gas constant (0.0821 L atm/mol K)
T = temperature (in K)

First, we need to convert the temperature from Celsius to Kelvin:
T = 25°C + 273.15 = 298.15 K
Next, we need to convert the pressure from kPa to atm:
1 atm = 101.325 kPa
P = 101.352 kPa * (1 atm/101.325 kPa) = 1.000267 atm

Now, we can solve for the volume (V) using the Ideal Gas Law formula:
V = nRT/P
Plugging in the values:
V = (1.0 mol) * (0.0821 L atm/mol K) * (298.15 K) / (1.000267 atm)
V ≈ 24.46 L
The volume of the container is approximately 24.46 liters.

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Yes, conjugate bases of strong acids make good leaving groups.

This is because they are stable and highly reactive due to their negative charge. They are also able to stabilize the charge that results from the departure of the leaving group.

Examples of conjugate bases include chloride ion (Cl-), bromide ion (Br-), and iodide ion (I-) which are the conjugate bases of hydrochloric acid (HCl), hydrobromic acid (HBr), and hydroiodic acid (HI) respectively. Another example is the sulfate ion (SO4 2-) which is the conjugate base of sulfuric acid (H2SO4). These all make good leaving groups due to their stability and reactivity.

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The volume of Florine gas under 0.61 atm of pressure and 20 degrees Celsius is approximately 104.6 liters.

What is Volume?

Volume is a measure of the amount of space occupied by a three-dimensional object. It is typically measured in cubic units, such as cubic meters (m³) or cubic centimeters (cm³).

To calculate the volume of the Florine gas, we can use the Ideal Gas Law which states that PV=nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

First, we need to convert the given pressure and temperature values to the correct units:

Pressure: 0.61 atm

Temperature: 20°C = 293 K

The molar mass of Florine is 18.998 g/mol. We can use this to calculate the number of moles present:

n = mass / molar mass = 41.3 g / 18.998 g/mol = 2.17 mol

Now we can rearrange the Ideal Gas Law to solve for V:

V = (nRT) / P

Plugging in the values we have:

V = (2.17 mol x 0.08206 L·atm/mol·K x 293 K) / 0.61 atm

V = 104.6 L

Therefore, the volume of Florine gas under 0.61 atm of pressure and 20 degrees Celsius is approximately 104.6 liters.

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the pH of a substance that has a hydrogen ion concentration of 1.2 x 10⁻²M is 1.92.

The pH of a substance is a measure of its acidity or alkalinity and is calculated using the formula:

pH = -log10[H+]

where [H+] represents the hydrogen ion concentration in moles per liter (M).

In this case, the hydrogen ion concentration is 1.2 x 10⁻² M.

To find the pH, simply apply the formula:

pH = -log10(1.2 x 10⁻²)

After calculating, you will find that the pH is approximately 1.92.

This means that the substance is acidic, as a pH below 7 indicates acidity.

Among the given options (0.080, 1.00, 1.92, 2.08), the correct pH value for the substance with a hydrogen ion concentration of 1.2 x 10⁻² M is 1.92.

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The standard molar enthalpy of the formation of N2O5(g) at 298 K is 19.913 kJ/mol.

To write a balanced chemical equation for the standard enthalpy of formation of N₂O₅, we start with the elements nitrogen and oxygen in their standard states:

N₂(g) + 5/2 O₂(g) → N₂O₅(g)

This equation shows that one mole of N₂ reacts with 2.5 moles of O₂ to form one mole of N₂O₅.

The standard enthalpy of formation, ΔHf°, is defined as the enthalpy change for the formation of one mole of a compound from its constituent elements in their standard states, all at 1 atm pressure and a specified temperature (usually 298 K). The enthalpy change can be calculated from the standard molar internal energy of formation, ΔUf°, using the equation:

ΔHf° = ΔUf° + RT

where R is the gas constant and T is the temperature in Kelvin.

Substituting the given values, we get:

ΔHf° = 17.433 kJ/mol + (8.314 J/mol*K)(298 K) / 1000 J/kJ
ΔHf° = 17.433 kJ/mol + 2.480 kJ/mol
ΔHf° = 19.913 kJ/mol

Therefore, the standard molar enthalpy of the formation of N₂O₅(g) at 298 K is 19.913 kJ/mol.

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The true electron density of a molecule with various resonance forms is determined by considering the contributions of each resonance structure and creating a resonance hybrid that represents the weighted average of these structures.

To determine the true electron density in a molecule with various resonance forms, you need to consider the concept of resonance hybrid.

1. Identify the resonance forms: First, draw all the possible resonance structures for the molecule, ensuring that they follow the basic principles of resonance.

2. Evaluate resonance contributors: Assess the importance of each resonance structure based on its stability and contribution to the overall structure. More stable resonance forms have a greater contribution to the true electron density.

3. Resonance hybrid: Combine the resonance forms to create a single resonance hybrid. This hybrid represents the true electron density distribution of the molecule by taking into account the weighted average of all resonance structures.

4. Calculate electron density: Use the resonance hybrid to calculate the electron density distribution in the molecule. This will give you the most accurate representation of the true electron density, as it considers the contributions of all resonance forms.

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The density of platinum with an edge length of 393 pm in a face-centered cubic unit cell is approximately 21,340 kg/m³ or 2.134 x 10⁴ g/m³.

The density of platinum can be calculated using the face-centered cubic (fcc) unit cell properties and the given edge length.

In an fcc unit cell, there are 4 atoms per unit cell. The edge length is 393 pm, and the atomic weight of platinum is 195.08 g/mol.

To calculate the density, we'll use the formula:

Density = (Mass of atoms in unit cell) / (Volume of unit cell)

First, we need to find the mass of atoms in the unit cell:

Mass of atoms = (4 atoms/unit cell) * (195.08 g/mol) / (Avogadro's number)

Mass of atoms ≈ 1.297 x 10⁻²¹g

Next, we convert the edge length to meters:

393 pm = 393 x 10⁻¹² m

Now, we calculate the volume of the unit cell:

Volume = (Edge length)³

Volume ≈ 6.077 x 10⁻²⁹ m³

Finally, we find the density:

Density = (Mass of atoms) / (Volume)

Density ≈ 2.134 x 10⁴ g/m³

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Answer:

Balanced equation: 2Al + Fe₂O₃ → 2Fe + Al₂O₃

Molar mass of aluminum (Al) = 26.98 g/mol

Molar mass of iron (Fe) = 55.85 g/mol

Molar mass of rust (Fe₂O₃) = 159.69 g/mol

Number of moles of aluminum: 55.0 g / 26.98 g/mol = 2.04 mol

Using mole ratio, we can determine that 2 moles of aluminum react with 1 mole of rust to produce 2 moles of iron.

Therefore, number of moles of iron formed = 2.04 mol / 2 = 1.02 mol

Mass of iron formed: 1.02 mol × 55.85 g/mol = 57.0 g

Therefore, 57.0 g of iron is formed.

The reaction where change in the free energy under standard conditions is 25.9 kj/mol, Then this reaction is not spontaneous as under the standard conditions, ∆G°>0. So, option(d) is right one.

This reaction is non- spontaneous as ∆G°>0, We know that, For a spontaneous reaction the free energy change must be negative, i.e ∆G= (-) Ve. If the free energy change is positive, ∆G°= (+) Ve, then the reaction must be non-spontaneous reaction. Simply, we can say that

Here ∆G°= 55 kj/mol that means it is a positive value and greater than zero so it satisfy the (1) condition ∆G°>0 thus it is a non-spontaneous reaction at standard condition.

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Complete question:

the change in the free energy under standard conditions is 25.9 kj/mol. is this reaction spontaneous as written under standard conditions?

a) Yes, ∆G°<0

b) No, ∆G°<0

c) Yes, ∆G°>0

d) No, ∆G°>0

(a.) Higher temperatures give a faster rate of reaction. We've seen before that when reactions are carried out at a higher temperature, they have a faster rate of reaction. In the Haber process, a higher temperature would allow the reaction to occur more quickly.

(b)  If the pressure is increased, the equilibrium position moves to the right, so the yield of ammonia increases. The rate of reaction also increases because the gas molecules are closer together, so successful collisions are more frequent.

If a body of water has low levels of dissolved oxygen, it can be concluded that there is a lack of oxygen available for aquatic organisms to breathe.

This can lead to negative impacts on the ecosystem and can cause harm to fish and other aquatic life that rely on oxygen to survive. Additionally, low levels of dissolved oxygen can indicate poor water quality and may be a sign of pollution or other environmental issues in the area.

Low dissolved oxygen levels can lead to reduced biodiversity, as some organisms may not survive in such conditions, and can also result in the growth of anaerobic organisms, which could further deteriorate water quality.

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The following modifications would take place if the succinate dehydrogenase enzyme were altered so that NAD+ could operate as the cofactor instead of FAD:

The use of NAD+ instead of FAD would result in a lower standard reduction potential (E°) for the reaction, making it less exergonic (less spontaneous) under standard conditions. a. The reaction would probably be reversible under cellular conditions. This implies that for the reaction to move forward, more energy would be needed.

However, using NAD+ as a cofactor can make more reducing equivalents available inside the cell, which might make the process more reversible in cellular settings.

Standard circumstances would not prevent succinate oxidation from occurring spontaneously because succinate oxidation to fumarate is an exergonic process and NAD+/NADH still have a lower standard reduction potential than succinate/fumarate (+0.03 V). Thus, under normal circumstances, succinate oxidation would still occur spontaneously.

The best appropriate response to the question is (d), which states that it is likely the reaction would be reversible in cellular settings.

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The KrCl₄ molecule is a tetrahedral structure composed of a central Kr atom and four Cl atoms which are located at the corners of a tetrahedron. The bond angle between the Cl atoms and the Kr atom is 120°.

This is because the four Cl atoms form a tetrahedral arrangement with the Kr atom at the center, meaning that the bond angle between the Cl atoms and the Kr atom is the same as the angle between any two adjacent Cl atoms, which is 120°.

This is due to the fact that the Kr atom has four bonding electrons and each Cl atom has one bonding electron, so the electron-electron repulsion is minimized when the molecules are arranged in a tetrahedral shape. This results in the Cl–Kr–Cl bond angle being 120°.

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The pH at the equivalence point is 3.16.

the pH at the equivalence point, we need to first determine the moles of each reactant.

Moles of hydrofluoric acid = (25.0 mL)(0.150 M) = 0.00375 moles

Since the reaction between hydrofluoric acid and sodium hydroxide is a 1:1 ratio, the moles of sodium hydroxide at equivalence point will also be 0.00375 moles.

Next, we can use the balanced chemical equation to find the concentration of hydroxide ions at equivalence point:

HF + NaOH → NaF + H2O

0.00375 moles of NaOH = 0.00375 moles of HF

Using the Ka expression for HF:

Ka = [H+][F-]/[HF]

We can assume that at the equivalence point, all of the HF has reacted with the NaOH to form NaF and water, leaving only F- and some leftover NaOH.

[NaOH] = 0.150 M

[F-] = 0.00375 moles / 0.025 L = 0.15 M

[H+] = Ka x [HF]/[F-] = (3.5 x 10^-4) x (0.00375 moles / 0.025 L) / 0.15 M = 7.0 x 10^-4 M

Using the pH equation:

pH = -log[H+] = -log(7.0 x 10^-4) = 3.16

Therefore, the pH at the equivalence point is 3.16.

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When potassium permanganate (KMnO4) oxidize bromide ions (Br-) in an aqueous solution, it produces a new form of bromine called bromine water (Br2(aq)). Bromine water is a pale yellow solution that contains diatomic bromine molecules (Br2). The reaction can be represented by the following chemical equation:

2KMnO4 + 6H2O + 10Br- → 2MnO2 + 2KOH + 3Br2 + 8H+

The reaction involves the transfer of electrons from bromide ions to the manganese atoms in KMnO4, causing the oxidation of Br- to Br2.

Now, coming to the second part of your question, non-polar mineral oil is not a suitable solvent for bromine water or bromide ions as they are both polar substances. However, if we consider the solubility of Br- and Br2 in non-polar solvents, Br2 would be more soluble in non-polar mineral oil due to its non-polar nature. Bromide ions, on the other hand, are polar and would not dissolve readily in non-polar solvents. In general, polar substances dissolve in polar solvents, while non-polar substances dissolve in non-polar solvents.

In conclusion, when KMnO4 oxidizes Br-, it produces bromine water (Br2(aq)). If we consider the solubility of Br2 and Br- in non-polar mineral oil, Br2 would be more soluble due to its non-polar nature.

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The concentration of the diluted solution as a result is 0.0146 M .

When we add the 30mL solution to another container and then dilute the container to about 240 mL it can be said that we have diluted the solution and the solution that we have at that point is the dilute solution of the substance.

The dilution formula will be used to arrive at that;

C1V1 = C2V2

We would therefore have that;

0.1176 * 30 = x * 240

where the new concentration following dilution is x.

x = 0.0146 M

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In the balanced reaction, the coefficients in front of Fe and H are as follows: H: 2 on the left side (in the form of H+ ions), and 2 on the right side (in the form of H₂ gas) Fe: 1 on each side.

The atoms of each element in the equation are first balanced. We only have Fe, H, and O in this situation.

One Fe is present on each side, however the reactant side has two Hs, while the product side contains 2H+. Two H+ ions are added to the reactant side to balance H. Additionally, this balances the charge, giving us 2H on both sides.

For the given equation in an acidic solution, the balanced redox reaction is: Fe₂+(aq) + H₂(g) = Fe(s) + 2H+(aq) + 2e-

So, the equation that is balanced and has coefficients is:

1Fe₂+(aq) + 1H₂(g) = 1Fe(s) + 2H+(aq) + 2e-

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The chemical law, which states that equal volumes of all ideal gases at the same temperature and pressure contain the same number of molecules, was first proposed by the Italian chemist Amedeo Avogadro. This principle is typically named after him as Avogadro's Law.

What is Amedeo Avogadro ?

In 1811, Avogadro published an article in a scientific journal, where he distinguished between molecules and atoms. He argued (contrary to what was thought) that in the case of water, the hydrogen and oxygen "atoms" were actually "molecules." One molecule of oxygen would react with two molecules of hydrogen (H2O).

Thus he proclaimed his famous hypothesis: "Equal volumes of any gases contain the same number of molecules when measured under the same conditions of temperature and pressure."

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7.45 atm is the initial pressure of a gas in balloon that has a volume of 14. 0 L and a temperature of 36 C when it was moved into a location with pressure of 5. 0 atm, 6. 0 L and 18. 0 C.

The ideal gas law, which links a gas's pressure, volume, temperature, and number of moles (n), can be used to address this issue:

PV = nRT

where R is the constant of an ideal gas.

We must use the initial circumstances existing before the balloon was relocated in order to determine the gas's initial pressure. The volume (V) and temperature (T) are known, but we still need to determine the amount of gas per mole (n).

n = PV/RT

By considering the starting conditions, we may determine n:

n = (P₁V₁)/(R*T₁)

where P1, V1, and T1 are the starting pressure, volume, and temperature, respectively.

n is calculated as (P114.0 L)/(0.0821L atm/mol*K * (36+273) K).

Now we may utilize the last circumstances to get the gas's final pressure:

P₂V₂ = nRT₂

where T₂ is the final temperature and V₂ the final volume.

P₂ = (nRT₂)/V₂

(P₁V₁T₂) (V₂*T₁)

P₂ is equal to (P114.0 L(18+273 K)/(6.0 L*(36+273 K)).

P₂ = 3.22 atm

The ideal gas law can also be used to determine the initial pressure:

P₁ = nRT₁/V₁

P₁ = (nRT₁)/V₁

P₁ = (14.0 L * 0.0821 L atm/molK * (36+273) K) / (3.22 atm * 6.0 L * (36+273) K).

P₁ = 7.45 atm

As a result, the balloon's gas had a 7.45 atm beginning pressure.

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To determine the solubility of CuC2O4(s) in pure water, we need to use the Ksp expression:

Ksp = [Cu2+][C2O4 2-]

Since CuC2O4(s) dissolves in water to form Cu2+ and C2O4 2-, we can assume that the solubility of CuC2O4(s) is "x" and the concentration of Cu2+ and C2O4 2- ions is also "x".

Therefore,

Ksp = x^2

2.9 × 10^-8 = x^2

x = sqrt(2.9 × 10^-8)

x = 0.00539

So, the solubility of CuC2O4(s) in pure water is 0.00539 moles/L.

To convert moles/L to grams/L, we need to multiply by the molar mass of CuC2O4:

63.55 + 2(12.01) + 4(16.00) = 197.56 g/mol

0.00539 mol/L x 197.56 g/mol = 1.065 g/L

Therefore, the answer is not one of the options given. However, we can round it to the nearest option, which is D) 0.18 g/L.

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