For 1 dish of potato wedges, you will need 5 potatoes , 2tbs pepper, and energy. You need to make 80 batches of potato wedges. How many potatoes do you need? Do you have enough?

Answer:

c

Explanation:

The acid dissociation constant, Kd, of barbituric acid is 7.63 × 10^-5, rounded to 2 significant digits.

The pH of a solution is related to the concentration of hydronium ions (H3O+) in the solution, which is in turn related to the concentration of the acid and its dissociation constant. Barbituric acid is a weak acid that dissociates according to the following equilibrium reaction:

HC4H3N2O3 ⇌ H+ + C4H3N2O3-

The acid dissociation constant, Kd, is defined as the ratio of the concentrations of the products (H+ and C4H3N2O3-) to the concentration of the undissociated acid (HC4H3N2O3) at equilibrium.

Kd = [H+][C4H3N2O3-]/[HC4H3N2O3]

To calculate Kd, we need to determine the concentrations of the species involved. From the pH of the solution, we can calculate the concentration of H+ using the expression:

pH = -log[H+]

Therefore, [H+] = 10^-pH = 10^-2.08 = 7.28 × 10^-3 M

Since barbituric acid is a monoprotic acid, the concentration of C4H3N2O3- is equal to the concentration of H+. Thus, [C4H3N2O3-] = 7.28 × 10^-3 M.

The initial concentration of HC4H3N2O3 is given as 0.70 M. At equilibrium, the concentration of undissociated acid will be 0.70 - [H+] = 0.70 - 7.28 × 10^-3 = 0.6937 M.

Substituting these values into the expression for Kd gives:

Kd = (7.28 × 10^-3)^2 / 0.6937 = 7.63 × 10^-5

Therefore, the acid dissociation constant, Kd, of barbituric acid is 7.63 × 10^-5, rounded to 2 significant digits.

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The mass of copper (ii) nitrate formed is 469 g Cu(NO₃)₂

The balanced chemical equation for the reaction between copper and silver is as follows:

From the equation, the mole ratio of Ag and  Cu(NO₃)₂ is 2 : 1

5.0 moles Ag × 1 mole Cu / 2 moles Ag = 2.5 moles Cu

2.5 moles Cu × 1 mole Cu(NO3)2 / 1 mole Cu = 2.5 moles Cu(NO₃)₂

The mass of 2.5 moles Cu(NO₃)₂ = 2.5₂ × 187.56 g/mol

Mass of copper (ii) nitrate = 469 g Cu(NO₃)₂

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The property of sodium being a good conductor of heat and electricity is a physical property.

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.

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Approximately 148.6 liters of hydrogen gas will be produced at 298 K and 0.990 atm when 6.00 moles of hydrochloric acid react with an excess of magnesium metal.

To determine the volume of hydrogen gas produced, we need to use the ideal gas law, which states that PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

Given:
- The temperature (T) is 298 K.
- The pressure (P) is 0.990 atm.
- The number of moles (n) of hydrochloric acid is 6.00 moles.

First, we need to calculate the number of moles of hydrogen gas produced. From the balanced chemical equation, we can see that for every 1 mole of hydrochloric acid, 1 mole of hydrogen gas is produced.
Since we have 6.00 moles of hydrochloric acid, we can conclude that 6.00 moles of hydrogen gas will be produced.

Next, we can use the ideal gas law to calculate the volume of hydrogen gas. Rearranging the equation to solve for volume, we have V = (nRT) / P.

Plugging in the values:
- n = 6.00 moles
- R = 0.0821 L·atm/(mol·K)
- T = 298 K
- P = 0.990 atm

V = (6.00 moles * 0.0821 L·atm/(mol·K) * 298 K) / 0.990 atm
Calculating this, we get V ≈ 148.6 L.

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One example of particles that can be drawn closer to occupy a smaller volume is a gas.

In the gaseous state, particles have high kinetic energy and are not strongly attracted to each other. They move freely and randomly, colliding with each other and the container walls.

Since there are minimal intermolecular forces holding them together, gas particles can be compressed or drawn closer together by reducing the volume of the container.

By decreasing the volume of a gas, such as by compressing it in a cylinder or container, the particles have less space to move around. They collide with each other more frequently, increasing the frequency of intermolecular collisions. As a result, the gas particles are drawn closer together, and the overall volume occupied by the gas decreases.

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To achieve the highest yield in the conversion of (1S,3S)-3-methylcyclohexan-1-ol into (1R,3S)-1-chloro-3-methylcyclohexane, the reagent of choice would be thionyl chloride (SOCl2).

The conversion of (1S,3S)-3-methylcyclohexan-1-ol into (1R,3S)-1-chloro-3-methylcyclohexane involves the substitution of a hydroxyl group (OH) with a chlorine atom (Cl) while maintaining the stereochemistry at the 3-position.

Thionyl chloride (SOCl2) is a commonly used reagent for the conversion of alcohols to alkyl chlorides. It reacts with alcohols via an SN2 mechanism, where the hydroxyl group is replaced by a chlorine atom.

The reason why thionyl chloride is preferred in this conversion is that it generally provides high yields and is selective for the desired substitution. Thionyl chloride reacts readily with alcohols and the resulting alkyl chlorides are generally of high purity. This reagent is known for its efficiency and effectiveness in alcohol chlorination reactions.

Other reagents commonly used for alcohol chlorination, such as phosphorus trichloride (PCl3) or phosphorus pentachloride (PCl5), can also be used but may have different selectivity or require additional steps to achieve the desired stereochemistry.

Therefore, for the highest yield and selective conversion of (1S,3S)-3-methylcyclohexan-1-ol into (1R,3S)-1-chloro-3-methylcyclohexane, thionyl chloride (SOCl2) is the recommended reagent.

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Answer:

SeCl₆ + O₂ → SeO₂ + 3Cl₂

Explanation:

Unbalanced:

SeCl₆ + O₂ → SeO₂ + Cl₂

Count the atoms.

On the left side, we have 1 Se atom, 6 Cl atoms, and 2 O atoms.

On the right side, we have 1 Se atom, 2 O atoms, and 2 Cl atoms.

So everything is balanced except for Cl. To balance, we put a 3 coefficient in front of Cl₂.

SeCl₆ + O₂ → SeO₂ + 3Cl₂

c:

Answer:

because they emit liquid waste wich is later dumped into the ocean causing a lot of harm and many fatalities in sea life

Explanation:

The grocer's power output is 60 Watts. Power is measured in Watts, which represents the rate of energy transfer or work done per unit time.

Power is defined as the rate at which work is done or energy is transferred. It can be calculated using the formula: Power = Work / Time.

In this case, the work done by the grocer is equal to the force applied multiplied by the distance moved. The force applied is 100 N and the distance moved is 1.5 m, so the work done is:

Work = Force * Distance

Work = 100 N * 1.5 m

Work = 150 Joules

The time taken to perform the work is 2.5 seconds. Now we can calculate the power output:

Power = Work / Time

Power = 150 Joules / 2.5 seconds

Power = 60 Watts

Therefore, the grocer's power output is 60 Watts. Power is measured in Watts, which represents the rate of energy transfer or work done per unit time. It indicates how quickly the grocer is able to lift the crate of apples to the shelf.

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Answer:

Thermal decomposition

Explanation:

I am not completely sure but I have gone with this because one compound is breaking down into it's components due to heat. Someone correct me if I am wrong.

The energy released by a 0.1204-g sample of camphor combusted was first calculated. Then, using the specific heat formula and the given increase in temperature, the mass of the water in the calorimeter, which absorbed the heat from the combustion, was determined to be approximately 4.72 kg.

The energy per mole of camphor is given as -5903.6 kJ/mol. Given that the molar mass of camphor (C10H16O) is about 152.23 g/mol, we can determine the energy released by the 0.1204-g sample. This is equivalent to -5903.6 kJ x (0.1204 g / 152.23 g/mol) = -46.77 kJ.

Next, the energy gain of the bomb calorimeter and the water inside it (since heat lost is equal to heat gained) can be ascertained. This is calculated by using the specific heat formula: q = mcΔT, where q is heat energy, m is mass, c is specific heat capacity (4.18 J/g°C for water), and ΔT is temperature change. Solving for m, we get m = q / (cΔT) = (-46.77 kJ / 4.18 J/g°C x 2.28°C) which is in kg since 1J=1kg.m²/s².

After doing the math, the mass of water used in the calorimeter is approximately found to be 4.72 kg.

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Answer:

Y

ou have learnt in your previous classes that the sour and bitter

tastes of food are due to acids and bases, respectively, present in them.

If someone in the family is suffering from a problem of acidity after

overeating, which of the following would you suggest as a remedy– lemon

juice, vinegar or baking soda solution?

n Which property did you think of while choosing the remedy?

Surely you must have used your knowledge about the ability of

acids and bases to nullify each other’s effect.

n Recall how we tested sour and bitter substances without tasting

them.

You already know that acids are sour in taste and change the colour

of blue litmus to red, whereas, bases are bitter and change the colour of

the red litmus to blue. Litmus is a natural indicator, turmeric is another

such indicator. Have you noticed that a stain of curry on a white cloth

becomes reddish-brown when soap, which is basic in nature, is scrubbed

on it? It turns yellow again when the cloth is washed with plenty of

water. You can also use synthetic indicators such as methyl orange and

phenolphthalein to test for acids and bases.

In this Chapter, we will study the reactions of acids and bases, how

acids and bases cancel out each other’s effects and many more interesting

things that we use and see in our day-to-day life. Do You Know?

Litmus solution is a purple dye, which is extracted from lichen, a plant belonging to

the division Thallophyta, and is commonly used as an indicator. When the litmus

solution is neither acidic nor basic, its colour is purple. There are many other natural

materials like red cabbage leaves, turmeric, coloured petals of some flowers such as

Hydrangea, Petunia and Geranium, which indicate the presence of acid or base in a

solution. These are called acid-base indicators or sometimes simply indicators.

2021–22

18 Science

2.1 UNDERSTANDING THE CHEMICAL PROPERTIES OF

ACIDS AND BASES

2.1.1 Acids and Bases in the Laboratory

Activity 2.1

These indicators tell us whether a substance is acidic or basic by

change in colour. There are some substances whose odour changes in

acidic or basic media. These are called olfactory indicators. Let us try

out some of these indicators.

Explanation:

The time taken for the isotope of the sample element having a half life of 27.7 days to decay from its 600 g sample to 75 g is 36.09 days.

Radioactive decay is a nuclear reaction by which an unstable nuclei will undergo emission of charged particles such as alpha, beta, gamma.

By this process unstable nuclei will form their stable isotope or other new atoms. The decay constant k for the nuclear reaction is calculated from the half life time as below:

decay constant = 0.693 /27.7 days

                          = 0.025 days-1

Now the time taken for the decay of 600 g of the sample to 75 g is calculate as follows:

t = 1/(0.025) log (600/75)

  = 36.09 days

Hence,  time taken for the isotope of the sample element having a half life of 27.7 days to decay from its 600 g sample to 75 g is 36.09 days.

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The ratio of argon-40 to potassium-40 two half-lives after the rock has formed is 7:1.

The half-life of a radioactive compound tells us the time needed for half of the atoms of any compound to go through the radioactive decay.

We know that, half-life of potassium-40 is 1.25 billion years because this is how long it takes for half of the number of atoms which are present in the sample to decay to argon-40.

The half-life of potassium-40 which decays by the beta emission is 1.28 × 10⁹ years. The half-life of potassium-40 which decays by the positron emission is 1.19 × 10¹⁰ years.

40 K which naturally occurs decays to the stable 40 Ar which is 11.2%, It happens by the capture of electron and by positron emission. It gets decayed to stable 40 Ca (88.8%) by emission of negatrons. Half-life of 40 K 1.25 x 10⁹ years.

The dating method of potassium-argon is specifically useful in determining the Lava age.

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C8 columns refer to chromatography columns that contain a stationary phase consisting of hydrocarbon chains with eight carbon atoms. c8 columns means none of the given options. The correct answer is (d) None of the above.

C8 columns refer to chromatography columns that contain a stationary phase consisting of hydrocarbon chains with eight carbon atoms. These carbon chains are typically covalently bonded to a solid support material.

The C8 designation represents the length and composition of the hydrocarbon chains in the stationary phase.

These columns are commonly used in chromatography techniques, such as reversed-phase liquid chromatography, where nonpolar compounds are separated based on their interactions with the hydrophobic stationary phase.

The C8 stationary phase provides moderate retention for analytes with different polarities, allowing for effective separation.

The statement about ionic bonding or the presence of a phenyl group is not applicable to C8 columns.

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Dialysis tubing is a tool that separates larger molecules from smaller ones by allowing them to pass through a membrane, which is ideal for comparing the concentrations of different solutions. By placing the different concentrations of starch solution in two separate beakers, the concentration of each can be measured by the mass of the tubing after immersion in each.  

Dialysis tubing is used to separate starch molecules from water molecules in this experiment. The mass of the tubing, which is filled with the starch solution, will be different depending on the concentration of starch in each solution. The more concentrated solution will weigh more after being immersed in the dialysis tubing because the tubing will absorb more of the solution.
To perform this experiment, you would first soak the dialysis tubing in a beaker of water to soften it. Then, after measuring different amounts of starch solution in each beaker, you would carefully fill the dialysis tubing with each solution using a syringe. After the tubing is filled, tie off the ends and suspend it in another beaker of water. After a period of time, typically 30 minutes to an hour, remove the tubing and dry it. Weigh the tubing and compare the two weights.
The more concentrated solution will weigh more than the less concentrated solution. If the dialysis tubing is more massive after being immersed in one of the beakers, that indicates that the starch solution in that beaker is more concentrated. As a result, by using dialysis tubing, it is possible to determine which starch solution is more concentrated.

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Answer:

6 water molecules are produced with hydrogen being the limiting reactant

Explanation:

Hydrogen gas reacts with oxygen gas to form water according to the equation

From the coefficients in the reaction equation, we can see that it takes two molecules of hydrogen to react with one molecule of oxygen. Since we begin with equal amounts of both gasses, we can conclude that hydrogen is the limiting reactant because we use it upHydrogen gas reacts with oxygen gas to form water according to the equation

From the coefficients in the reaction equation, we can see that it takes two molecules of hydrogen to react with one molecule of oxygen. Since we begin with equal amounts of both gasses, we can conclude that hydrogen is the limiting reactant because we use it up first.

If more \(H_{2}\) and \(N_{2}\) are added to the reaction 3\(H_{2}\) + N2 → 2\(NH_{3}\) after it reaches equilibrium, two events will occur Shift in Equilibrium and Increased Yield of \(NH_{3}\)

1. Shift in Equilibrium: According to Le Chatelier's principle, when additional reactants are added, the equilibrium will shift in the forward direction to consume the added reactants and establish a new equilibrium. In this case, more \(NH_{3}\) will be produced to counteract the increase in \(H_{2}\) and \(N_{2}\).

2. Increased Yield of \(NH_{3}\): The shift in equilibrium towards the forward reaction will result in an increased yield of \(NH_{3}\). As more \(H_{2}\) and \(N_{2}\) are added, the reaction will favor the production of \(NH_{3}\) to maintain equilibrium. This will lead to an increase in the concentration of \(NH_{3}\) compared to the initial equilibrium state.

It is important to note that the equilibrium position will ultimately depend on factors such as the concentrations of \(H_{2}\), \(N_{2}\), and \(NH_{3}\), as well as the temperature and pressure of the system. By adding more reactants, the equilibrium will adjust to achieve a new balance, favoring the formation of more \(NH_{3}\).

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The systematic name for the compound Ba(NO3)2 is barium nitrate. Barium nitrate is an inorganic salt with the chemical formula Ba (NO3)2. It is a colorless, odorless, and crystalline solid that is highly soluble in water. The compound is formed by combining one atom of barium and two ions of nitrate.

The name “barium” comes from the Greek word “barys,” which means “heavy,” and is a reference to its high density. The term “nitrate” refers to the polyatomic ion NO3-, which is composed of one nitrogen atom and three oxygen atoms. Barium nitrate is commonly used in pyrotechnics, as it is a powerful oxidizing agent that produces a bright green flame when ignited.

The systematic naming of inorganic compounds is based on the rules set out by the International Union of Pure and Applied Chemistry (IUPAC). The name of an ionic compound is composed of the cation name followed by the anion name. In the case of barium nitrate, “barium” is the name of the cation, while “nitrate” is the name of the anion.

Therefore, the systematic name for the compound Ba(NO3)2 is barium nitrate.

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Answer:

1. Foods that have changes that are chemically introduced.

2. corn soybeans apples etc

3. sot they last longer or look better

4. new dna is placed in them and their seeds

5. they are not as good for humans

Explanation:

Answer:

long chainlike molecules composed of a series of nearly identical building blocks called nucleotides.

Explanation:

Each nucleotide consists of a nitrogen-containing aromatic base attached to a pentose (five-carbon) sugar, which is in turn attached to a phosphate group.

The volume of the balloon in the freezer is approximately 1.77 L.The ideal gas law is PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the gas constant, and T is temperature.

Since pressure is constant, we can use the combined gas law to solve the problem.The combined gas law is

P1V1/T1 = P2V2/T2,

where P1 and T1 are the initial pressure and temperature, and P2 and T2 are the final pressure and temperature. Let's start with the initial state of the balloon:

V1 = 2.00 L T1

= 32.0 °C + 273.15 K

= 305.15 K

Now let's find the final volume of the balloon when it's in the freezer:

V2 = P1V1T2/T1P1

= constant

T2 = -3.6 °C + 273.15 K

= 269.55 K

Now we can plug in the values and solve for V2:

V2 = P1V1T2/T1

= (1 atm)(2.00 L)(269.55 K)/(305.15 K)

≈ 1.77 L

Therefore, the volume of the balloon in the freezer is approximately 1.77 L.

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The percent yield of H₂O, if 87.0 g of H₂O is produced by combining 95.0 g of O₂ and 11.0 g of H₂ is 87.87%.

Mass of any substance will be calculated by using their moles as:

n = W/M, where

W = given or required mass

M = molar mass

Moles of 95g of Oxygen (O₂) = 95g / 32g/mol = 2.96 moles

Moles of 11g of hydrogen (H₂) = 11g / 2g/mol = 5.5 moles

Given chemical reaction is:
2H₂ + O₂ → 2H₂O

From the stoichiometry of the reaction, it is clear that:

1 moles of O₂ = reacts with 2 moles of H₂

2.96 moles of O₂ = reacts with 2×2.96=5.92 moles of H₂

Here hydrogen is the limiting reagent as it has lower moles and formation of water depends on this only.

2 moles of H₂ = produces 2 moles of water

5.5 moles of H₂ = produces 5.5 moles of water

Mass of 5.5 moles of water will be calculated as:

W = (5.5mol)(18g/mol) = 99g

Given theoretical yield of water = 87g

% yield of water will be calculated as:
% yield = (87 / 99)×100 = 87.87%

Hence required value is 87.87%.

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Answer:

D

Explanation:

The p-toluic acid and 4-t-butylphenol can be neutralized or extracted by different chemical reactions using specific elements, thus creating new compounds or acid-base reactions.

The chemical equations for the acid-base reactions that occur during extraction and neutralization of p-toluic acid and 4-t-butylphenol using brine, HCl, sodium bicarbonate, and anhydrous magnesium sulfate are as follows:

1) Extraction of p-toluic acid with brine:
p-toluic acid + NaCl (brine) → Na+ + Cl- + p-toluic acid

2) Neutralization of p-toluic acid with sodium bicarbonate:
p-toluic acid + NaHCO3 (sodium bicarbonate) → Na+ + HCO3- + p-toluic acid

3) Extraction of 4-t-butylphenol with HCl:
4-t-butylphenol + HCl → H+ + Cl- + 4-t-butylphenol

4) Neutralization of 4-t-butylphenol with anhydrous magnesium sulfate:
4-t-butylphenol + MgSO4 (anhydrous magnesium sulfate) → Mg2+ + SO42- + 4-t-butylphenol

These chemical equations show the reactions that occur during the extraction and neutralization processes of p-toluic acid and 4-t-butylphenol using the specified reagents.

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Correct answer is Each orbit has a specific energy level.

Therefore, Correct statement is Each orbit has a specific energy level.

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The complete question is mentioned below:

Which statement about Niels Bohr’s atomic model is true?

a) Higher orbits have lower energies.

b) Each orbit has a specific energy level. c) Electrons can exist in any energy level. d) Orbits close to the nucleus have no energy.

The uninformed Searches​ includes depth-first search and uniform-cost search, while informed search involves A* search, heuristic search as well as greedy search.

Uninformed search, also known as blind search or unguided search, is a type of general-purpose search algorithm that uses brute force.

The term 'uninformed' refers to the fact that they have no additional information about states other than what is provided in the problem definition.

Because they lack information about state space and target problems, the algorithms of this strategy can be applied to a wide range of computer science problems.

Uninformed searches include depth-first searches and uniform-cost searches, whereas informed searches include A* searches, heuristic searches, and greedy searches.

Thus, this way both types of searches can be separated.

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If density of gold is 19.3g/cm3 amd mass is 5.23 g, then volume obtained is 0.27cm3.

Density is defined as how much a matter is packed in given area. It is represented by ρ.

ρ = m/ V

Given,

density of gold = 19.3 g/cm3

mass of gold = 5.23 g

As we know that,

density = mass/ volume

mass = density× volume

19.3 = 5.23 / volume

volume = 5.23/19.3

volume = 0.27 cm3.

Thus, if density and mass is given volume can be obtained.

Volume of gold is given as 0.27 cm3.

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Answer:

4 kilograms/liters

Explanation:

When an acid such as hydrochloric acid (HCl) reacts with a metal like zinc (Zn), the gas produced is hydrogen gas (H₂).

When hydrochloric acid (HCl) reacts with zinc (Zn), something interesting happens. The acid gives away its hydrogen atoms (H⁺) to the zinc. At the same time, the zinc gives away some of its electrons. As a result, hydrogen gas (H₂) is produced. The gas forms little bubbles that you might see during the reaction. The remaining zinc combines with the chlorine atoms (Cl⁻) from the acid to form zinc chloride (ZnCl₂). So, to sum it up, when acid (like HCl) and metal (like zinc) react, they create hydrogen gas and a compound called zinc chloride. The hydrogen gas bubbles out, and the zinc chloride dissolves in the remaining acid.

A single displacement reaction, also known as a metal-acid reaction, occurs when hydrochloric acid (HCl) and zinc (Zn) are in contact. This reaction results in the creation of zinc chloride (ZnCl₂) and hydrogen gas (H₂) as the zinc metal displaces the hydrogen in the hydrochloric acid. While the acid's hydrogen ions lose electrons and undergo oxidation, the zinc atoms acquire electrons and undergo reduction. It is a redox (reduction-oxidation) reaction because it includes both oxidation and reduction reactions.

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