Choose the compound with the most ionic bond.
A) LiCl B) KF C) NaCl D) LiF E) KCl

A typical adult contains approximately 0.0144 moles of hemoglobin in their body.

To calculate the number of moles of hemoglobin in a typical adult, we need to first find the total mass of hemoglobin in 6.0 liters of blood.

Using the given hemoglobin content of 15.5 g/100 mL of blood, we can find the total mass of hemoglobin in 6.0 liters of blood as follows:

15.5 g/100 mL x 6,000 mL = 930 g

Next, we need to convert the mass of hemoglobin to moles by dividing by its molecular weight of 64,500 g/mol:

930 g / 64,500 g/mol = 0.0144 moles of hemoglobin

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The given step refers to a procedure in which the remaining NaOCl present in the reaction mixture is neutralized.

This is achieved by adding 1 mL of 10% solution of a suitable reagent to the mixture and mixing it. The exact nature of the reagent is not specified, but it should be capable of reacting with NaOCl and converting it to a harmless compound. Quenching is an important step in many chemical reactions, as it ensures that any remaining reactants or products are deactivated or neutralized. Failure to quench can result in unwanted side reactions or hazardous by-products, which can pose a risk to the experimenter and the environment.

The choice of quenching reagent depends on the specific reaction being performed and the nature of the remaining reactant or product. Common quenching reagents include sodium bisulfite, sodium thiosulfate, and hydroxylamine hydrochloride, among others. In summary, step 4 involves quenching any remaining NaOCl present in the reaction mixture by adding a suitable quenching reagent and mixing. This ensures that the reaction is completed safely and effectively, with minimal risk of unwanted side reactions or hazards.

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A spontaneous redox reaction is characterized by a negative ∆G (free energy change) and a positive ∆E (emf, or electrochemical potential).

This means that the reaction proceeds spontaneously, releasing energy and driving electron transfer from the reducing agent to the oxidizing agent. The negative ∆G indicates that the reaction is thermodynamically favorable, while the positive ∆E indicates that the reaction will proceed spontaneously without the need for external energy input. This is in contrast to non-spontaneous reactions, which have a positive ∆G and require an input of energy to proceed.
It's worth noting that the ∆E and ∆G values for a given redox reaction depend on the specific reactants and conditions involved. However, in general, a spontaneous redox reaction will have a negative ∆G and a positive ∆E.

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Water polar because b. the electrons are shared unequally

In a water molecule, the oxygen atom is more electronegative than the hydrogen atoms, which means it has a stronger attraction for electrons. As a result, the shared electrons spend more time near the oxygen atom, creating a partial negative charge on the oxygen end of the molecule and partial positive charges on the hydrogen ends, this uneven distribution of charges leads to water's polarity. This polarity allows water molecules to form hydrogen bonds with one another, making them cohesive.

These hydrogen bonds are responsible for many of water's unique properties, such as its high boiling point and high specific heat capacity. While water is composed of nonmetals (hydrogen and oxygen), this fact alone does not make it polar. The key factor is the difference in electronegativity between the constituent atoms, which leads to the unequal sharing of electrons and ultimately gives water its polar nature. So therefore water is polar due to the unequal sharing of electrons between the hydrogen and oxygen atoms, the correct answer is b. the electrons are shared unequally.

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The balanced equation is:[tex]MnO_4^- + 6CH_3OH + 8H+[/tex] → [tex]2Mn_2+ + 6CH_3O_2H + 2H_2O[/tex]. In an acidic solution, H+ ions are added to balance the equation.

The given equation represents a redox reaction that occurs in an acidic solution. Methanol and Methanoic acid are the products formed in the reaction. Potassium permanganate is the oxidizing agent that gets reduced to [tex]Mn_2+[/tex] and methanol is the reducing agent that gets oxidized to methanoic acid. H+ ions are added to balance the equation and to make it acidic. This reaction is also used for the quantitative determination of methanol in various samples.

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A strong acid has a relatively WEAK conjugate base that forms readily and is therefore MORE stable than the conjugate base of a weak acid.

A strong acid has a relatively weak conjugate base that forms readily and is therefore more stable than the conjugate base of a weak acid. Anything that increases the stability of a conjugate base makes the starting acid more acidic.

Strong acids have quickly forming, relatively weak conjugate bases that are more stable than the conjugate bases of weak acids. The initial acid becomes more acidic as a conjugate base's stability is increased.

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To convert pyruvate to PEP, the enzyme phosphoenolpyruvate carboxykinase (PEPCK) is used.

PEPCK catalyzes the conversion of oxaloacetate (OAA) to PEP through a series of reactions that involve the removal of a carbon dioxide molecule and the transfer of a phosphate group from guanosine triphosphate (GTP) to OAA. This reaction is a crucial step in gluconeogenesis, the process by which glucose is synthesized from non-carbohydrate sources such as amino acids, fatty acids, and lactate. PEPCK is found in various tissues, including the liver, kidney, and adipose tissue, and is regulated by hormones such as glucagon and cortisol.

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Dmitri Mendeleev was the first person to devise a useful "periodic table" of the elements.

Dmitri Mendeleev, a Russian chemist, was the first person to create a periodic table of the elements. In 1869, he published his version of the periodic table, which arranged the elements in order of increasing atomic weight and grouped them by similar chemical properties.

He left gaps in the table where he predicted that undiscovered elements would fit, and he made predictions about the properties of these unknown elements based on their position in the table. Mendeleev's periodic table became widely accepted and formed the basis for the modern periodic table.

Later, the discovery of atomic number by Henry Moseley led to the current arrangement of elements in order of increasing atomic number, which gave rise to the periodic law: the properties of elements are periodic functions of their atomic number.

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Tin (Sn) has ten naturally occurring isotopes.

These isotopes are variations of the element tin with different numbers of neutrons in their nuclei.

The isotopes have the same chemical properties as tin but may have slightly different physical properties due to their differing masses.

Summary: Tin has ten naturally occurring isotopes, which are variations of the element with different numbers of neutrons. They share the same chemical properties, but may have slightly different physical properties.

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A glycoconjugate molecule may include a carbohydrate as well as an B: "amino acid, a lipid, and a saccharide."

A glycoconjugate molecule is a complex molecule that consists of a carbohydrate component along with other molecular components. These other components can include amino acids, lipids, and saccharides. Amino acids are the building blocks of proteins, while lipids are a diverse group of molecules that include fats and oils. Saccharides, also known as sugars, are carbohydrates.

Therefore, a glycoconjugate molecule can have multiple components, including a carbohydrate (saccharide), an amino acid, and a lipid. This combination of components allows for diverse functions and biological activities of glycoconjugates in various cellular processes.

Option B is answer.

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Answer: Both an amino acid and a lipid.

Explanation: I tried the answer that was provided (that included a saccharide) and I got it wrong.

The total dilution factor of the enzyme is 500.

To calculate the total dilution factor of the enzyme, we need to find the overall dilution factor of the enzyme solution.

The initial volume of the enzyme solution is 25.0 mL, which was prepared by diluting 0.100 mL of the commercial preparation to 25.0 mL.

The dilution factor for this step is:

dilution factor = final volume / initial volume

dilution factor = 25.0 mL / 0.100 mL

dilution factor = 250

This means that the enzyme solution is diluted 250-fold.

In the experiments, 1.0 mL of each substrate solution was mixed with 1.0 mL of the diluted enzyme solution. This is a 2-fold dilution.

Therefore, the total dilution factor for the enzyme solution in the experiments is:

total dilution factor = enzyme dilution factor x substrate dilution factor

total dilution factor = 250 x 2

total dilution factor = 500

So, the total dilution factor for the enzyme in the experiments is 500.

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A bond formed by the sideways overlap of two p orbitals (one from each bonding atom) is called a pi (π) bond. This type of bond has 2 regions of electron density.

In a π bond, the electron density is concentrated above and below the internuclear axis, forming two regions of electron density. It is generally weaker than a sigma (σ) bond, which is formed by the head-on overlap of atomic orbitals and has only one region of electron density.

Both π and σ bonds are crucial in forming molecular structures and determining their properties. pi bonds play a crucial role in the formation of double and triple bonds, which are important for the stability and reactivity of many organic and inorganic molecules.

In summary, a pi bond is formed by sideways overlap of two p orbitals (one from each bonding atom), and has two region of electron density.

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The given statement "Pure solids and pure liquids are excluded from the equilibrium-constant expressions" is true because they have a fixed concentration that does not change during a chemical reaction, and therefore, do not affect the equilibrium constant.

The equilibrium constant is a mathematical expression that relates the concentrations of reactants and products at equilibrium. However, the concentrations of pure solids and pure liquids do not change during a chemical reaction and are considered constant.

Therefore, including them in the equilibrium constant expression would not provide any useful information and would only complicate the calculation.

As a result, pure solids and pure liquids are excluded from the equilibrium constant expressions, and only the concentrations of gases and solutes in solution are included. This simplifies the calculation and provides a more accurate representation of the equilibrium state.

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Question

Pure solids and pure liquids are excluded from the equilibrium-constant expressions?T/F

The addition of hydrofluoric acid and NaF (sodium fluoride) to water produces a buffer solution. option(C).

A buffer solution is a solution that resists changes in pH when small amounts of acid or base are added to it. Buffers are typically made up of a weak acid and its conjugate base, or a weak base and its conjugate acid.

When an acid is added to a buffer solution, it reacts with the conjugate base to form the weak acid, which consumes the added acid and prevents the pH from decreasing significantly.

Similarly, when a base is added to a buffer solution, it reacts with the weak acid to form the conjugate base, which consumes the added base and prevents the pH from increasing significantly.

In this case, hydrofluoric acid (HF) is a weak acid, and NaF is the salt of its conjugate base, fluoride ion (F-). When HF is added to water, it partially dissociates to form H+ and F-, and the F- ion reacts with the added H+ to form HF, effectively consuming the added acid and preventing the pH from decreasing significantly. The resulting solution is a buffer solution.

Therefore, the correct answer is (C) NaF.

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Kp and Kc are related to each other by the gas constant (R) and the temperature (T) of the system in question.

The relationship between Kp and Kc can be explained in the following two steps:

Kp and Kc are equilibrium constants that describe the position of an equilibrium in terms of pressure or concentration, respectively. The relationship between Kp and Kc is given by the following equation:

Kp = Kc(RT)^Δn

where Δn is the difference in the number of moles of gaseous products and reactants in the balanced chemical equation.

From the above equation, we can see that Kp and Kc are related to each other by the gas constant (R) and the temperature (T) of the system. Specifically, Kp is equal to Kc multiplied by (RT)^Δn.

This means that at a given temperature, Kp and Kc are proportional to each other, with the proportionality constant being (RT)^Δn.

In other words, if the temperature of the system is held constant, changes in pressure will affect Kp and changes in concentration will affect Kc.

But the two equilibrium constants will always be related to each other through the gas constant and the temperature of the system.

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The percent by mass of HCl in the tile cleaner solution is 14.85%.

To calculate the percent by mass of HCl, we first need to determine the total mass of the solution. This can be found by adding the mass of HCl and the mass of water:

135 g HCl + 775 g water = 910 g solution

Next, we can calculate the mass percent of HCl by dividing the mass of HCl by the total mass of the solution and multiplying by 100:

(135 g HCl / 910 g solution) x 100% = 14.85% HCl

Therefore, the percent by mass of HCl in the tile cleaner solution is 14.85%.

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Eosin-Methylene Blue agar (EMBA) is a selective and differential medium. Based on the information that it contains peptone, lactose, sucrose, potassium phosphate, and the dyes for which it is made.

EMBA is a selective medium because it contains the dyes eosin and methylene blue, which inhibit the growth of Gram-positive bacteria, allowing only the growth of Gram-negative bacteria.

It is also a differential medium because it contains lactose and sucrose, which allows for the differentiation of bacteria based on their ability to ferment these sugars.

Bacteria that can ferment lactose or sucrose will produce a change in the color of the medium, making it easy to distinguish between fermenting and non-fermenting colonies.
Based on the information provided, EMBA is a selective and differential medium, used for the isolation and differentiation of Gram-negative bacteria based on their ability to ferment lactose and sucrose.

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The volume of 0.205 M KOH solution required to neutralize 55 mL of 0.120 M H₂SO₄ is 22.5 mL.

The volume of 0.205 M KOH solution required to neutralize 55 mL of 0.120 M H₂SO₄, we can use the balanced chemical equation for the reaction between H₂SO₄ and KOH.

The stoichiometry of the reaction shows that 1 mole of H₂SO₄ reacts with 2 moles of KOH to produce 1 mole of K₂SO₄ and 2 moles of H₂O. Using the molarity and volume of H₂SO₄ given, we can calculate the number of moles of H₂SO₄ in the sample. From there, we can use the stoichiometry of the reaction to determine the number of moles of KOH needed to neutralize the H₂SO₄.

we can use the molarity of the KOH solution and the number of moles of KOH needed to calculate the volume of KOH solution required. In this case, the volume of 0.205 M KOH solution required to neutralize 55 mL of 0.120 M H₂SO₄ is 22.5 mL.

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There are 2 linear molecules and ions among NCl3, CH4, SCN-, CS2, and NO2-.

To determine the shape of a molecule or ion, we need to consider its electron geometry. In the given options, SCN- and NO2- are linear.

For SCN-, the central atom is S with 2 single bonds and 1 lone pair, giving it a linear geometry.

For NO2-, the central atom is N with 1 single bond, 1 double bond, and 1 lone pair, also giving it a linear geometry. NCl3, CH4, and CS2 have different shapes.

Summary: Among NCl3, CH4, SCN-, CS2, and NO2-, 2 of them (SCN- and NO2-) are linear.

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A respirator is a protective device that covers the nose and mouth and filters out harmful particles in the air.

That many pesticides contain chemicals that can be harmful if inhaled, and using a respirator is an important safety measure to prevent respiratory problems or other health issues.

Respirators come in different types and sizes, so it's important to choose the right one for the specific pesticide being used and to properly fit and use the respirator according to manufacturer instructions.

In summary, using a respirator is the best way to avoid breathing toxic vapors when applying pesticides, and it's important to choose the right type of respirator and use it correctly for maximum protection.

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At equilibrium, the ratio of [SO₃]² to [SO₂]²[O₂] equals the Keq (2.80 x 10²) for the given reaction.

At equilibrium, the concentrations of reactants and products in the gas phase reaction 2SO₂ (g) + O₂ (g) ↔ 2SO₃ (g) achieve a constant state where the rate of the forward reaction equals the rate of the reverse reaction.

The equilibrium constant (Keq) represents the ratio of product concentrations raised to their stoichiometric coefficients divided by the reactant concentrations raised to their stoichiometric coefficients.

For this reaction, Keq = ([SO₃]²)/([SO₂]²[O₂]). At 30°C, the Keq value is 2.80 x 10², indicating the equilibrium state for the given reaction under the specified conditions.

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The pH of the solution after the addition of 0.0 mL NaOH will be 2.00. This means the solution is acidic. As NaOH is added during titration, it will react with the H+ ions to form water and Na+ ions.

The pH of the solution initially will be determined by the presence of the HCl. HCl is a strong acid and will completely dissociate in water to form H+ and Cl- ions. This will result in a high concentration of H+ ions in the solution which will make the pH of the solution low. The pH of the solution will be calculated using the formula pH = -log[H+]. The concentration of H+ ions can be calculated by using the molarity of HCl.
pH = -log[H+]
[H+] = molarity of HCl x volume of HCl
[H+] = 0.500 M x 0.02000 L
[H+] = 0.0100 mol/L
pH = -log(0.0100)
pH = 2.00
Therefore, the pH of the solution after the addition of 0.0 mL NaOH will be 2.00. This means the solution is acidic. As NaOH is added during titration, it will react with the H+ ions to form water and Na+ ions. This will result in a decrease in the concentration of H+ ions and an increase in the concentration of Na+ ions. This will ultimately lead to an increase in the pH of the solution.

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azo dyes, synthetic fibers like polyester and nylon result in the most vibrant colors and Indigo dye is most effective on natural fibers such as cotton, wool, and silk.

Indigo dye is most effective on natural fibers such as cotton, wool, and silk. These fabrics will produce the most intense colors when dyed with indigo due to their strong affinity for the dye molecules.
Azo dyes work well on a variety of fabrics, including both natural and synthetic fibers. However, they tend to produce the most intense colors on polyester and nylon, as these synthetic fabrics have a high affinity for the azo dye molecules.
In summary, for indigo dyes, natural fibers like cotton, wool, and silk yield the most intense colors. For azo dyes, synthetic fibers like polyester and nylon result in the most vibrant colors.

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Hemi is known as the hemiacetal and is the endpoint in basic conditions. Hemiacetals are organic compounds that are formed by the reaction of aldehydes or ketones with alcohols in the presence of an acid catalyst.

In basic conditions, hemiacetals undergo a hydrolysis reaction to form the corresponding alcohol and aldehyde or ketone. This reaction is reversible, and the equilibrium lies towards the alcohol and aldehyde or ketone. Therefore, hemiacetals are considered to be the endpoint in basic conditions as they are the maximum point that can be reached in the reaction. Hemiacetals are important intermediates in many biological processes, including carbohydrate metabolism and protein folding. They also have applications in the synthesis of drugs and other organic compounds. In summary, hemi is known as the hemiacetal and is the endpoint in basic conditions due to the reversible nature of its hydrolysis reaction.

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The process of dry ice sublimation is an example of a spontaneous process that increases the overall entropy of the system.

When dry ice sublimes, the entropy of the system increases. Entropy is a measure of the disorder or randomness in a system, and the transition of solid carbon dioxide (dry ice) to gaseous carbon dioxide increases the degree of randomness.

This is because the molecules of CO2 in the solid phase are highly ordered and arranged in a fixed lattice structure, while in the gaseous phase, they are highly disordered and spread out in all directions. The increase in entropy during the sublimation of dry ice is due to the increase in the number of microstates available to the system in the gaseous phase, resulting in an increase in entropy.

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The balanced molecular equation for the neutralization reaction between acetic acid and potassium hydroxide is:

CH3COOH + KOH → KCH3COO + H2O

In this reaction, acetic acid (CH3COOH) reacts with potassium hydroxide (KOH) to produce potassium acetate (KCH3COO) and water (H2O). The reaction is a neutralization reaction because the acid and base react to form a salt (potassium acetate) and water.

The concentrations of the reaction's reactants and products must be equal at equilibrium. Following is a description of how CO and H2O react to generate CO2 and H2: CO + H2O <=> CO2 + H2 We can determine the equilibrium CO and H2O concentrations using the available data.

The starting concentrations of CO and H2O are 0.800 M and 0.800 M, respectively, due to the total moles of CO and H2O being 2.00 moles and the total volume being 2.50 L. The equilibrium expression may be used to compute the equilibrium concentrations of CO and H2O: K = [CO2][H2]/[CO][H2O] K = (0.00775)(0.00775)/[CO] may be used to derive the equilibrium constant given that [CO2] and [H2] are both equal to 0.00775 M.

[H2O] K = (0.00775)(0.00775)/[0.0455], when the equilibrium concentrations of CO and H2O are plugged in.[0.0455]. ][0.0455] K = 0.0020 From this, we can calculate the equilibrium concentrations of CO and H2O: [CO] = 0.0455 M [H2O] = 0.0455 M .

The standard free energy change (G°), which can be calculated using the formula G° = -RTlnK, may be used to estimate the sign of G for this reaction. Since K > 1, we may anticipate a spontaneous response, meaning that G will be negative.

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16.7 g is the mass of HCl produced by the complete reaction of 36.0 g of acetyl chloride.

First, we need to determine the balanced chemical equation for the reaction:
C7H6O3 + C2H3ClO → C9H8O4 + HCl

Next, we can use stoichiometry to determine the amount of HCl produced when 36.0 g of acetyl chloride reacts:
1 mole of C2H3ClO reacts with 1 mole of HCl
The molar mass of C2H3ClO is 78.5 g/mol

Therefore, the number of moles of C2H3ClO in 36.0 g can be calculated as:
36.0 g / 78.5 g/mol = 0.458 mol

Using the balanced chemical equation, we can see that 1 mole of C2H3ClO reacts to produce 1 mole of HCl. Therefore, the number of moles of HCl produced in this reaction is also 0.458 mol.

Finally, we can calculate the mass of HCl produced using its molar mass:
Molar mass of HCl = 36.5 g/mol
Mass of HCl produced = number of moles of HCl × molar mass of HCl
Mass of HCl produced = 0.458 mol × 36.5 g/mol = 16.7 g

Therefore, the mass of HCl produced by the complete reaction of 36.0 g of acetyl chloride is 16.7 g.

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When the reaction is in equilibrium, it is in a state of dynamic balance, which means that the rate of the forward reaction and the rate of the reverse reaction are equal. The ratio of the product concentrations to the reactant concentrations, each raised to the power of its associated stoichiometric coefficient, is known as the equilibrium constant (Kc) for a process.

The ratio of the concentrations of the products, N2 and H2O, to the concentrations of the reactants, NO and H2, elevated to their respective stoichiometric coefficients, is therefore Kc for the given reaction.

Given that N2 has a zero beginning concentration, the equilibrium concentration of N2 may be determined using the NO and H2 initial concentrations. N2 concentration is equal to the starting concentration at equilibrium.The initial concentration of NO multiplied by the stoichiometric coefficient of N2 (2), divided by the sum of the stoichiometric coefficients of NO and H2 (3), yields the equilibrium concentration of N2, which is equal to the initial concentration of NO.

N2 is therefore present in 0.133 M of equilibrium. Similar calculations may be made for the equilibrium concentration of H2O using the starting concentration of H2 and the stoichiometric coefficients of H2 and H2O. The starting concentration of H2 multiplied by the stoichiometric coefficient of H2O (2), divided by the total of the stoichiometric coefficients of H2 and H2O (3), yields the equilibrium concentration of H2O. H2O's equilibrium concentration is 0.133 M as a result.

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The compound that is insoluble in water is MgC₂O₄. So, the correct option is C) MgC₂O₄. Compounds can be classified as soluble or insoluble in water based on their ability to dissolve in water. Soluble compounds are those that can dissolve in water to form a homogeneous solution, while insoluble compounds are those that do not dissolve in water and form a heterogeneous mixture.

K₂SO₄ is soluble in water, as it dissociates into K⁺ and SO₄²⁻ ions, which are surrounded by water molecules.

Ca(C₂H₃O₂)₂ is also soluble in water, as it dissociates into Ca²⁺ and 2C₂H₃O²⁻ ions, which can be hydrated by water molecules.

ZnCl₂ is soluble in water, as it dissociates into Zn²⁺ and 2Cl⁻ ions, which are surrounded by water molecules.

Mg(NO₃)₂ is soluble in water, as it dissociates into Mg²⁺ and 2NO³⁻ ions, which can be hydrated by water molecules.

MgC₂O₄ is insoluble in water, as it does not dissociate into ions that can be hydrated by water molecules. Instead, the compound exists as solid particles in the water, forming a heterogeneous mixture.

Therefore the correct option is C) MgC₂O₄.

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