Which of the following statements is true regarding Personal Protective Equipment (PPE) and hazardous substances?
PPE can help to minimize direct exposure to hazardous chemicals.
It is your employer's responsibility to provide your PPE.
You should wear any and all protective equipment that is recommend for your job.
All of these are correct.

The molecular formula of p-dichlorobenzene is C6H4Cl2.

The simplest whole-number ratio of the atoms in a compound is an empirical formula. In other words, it shows the relative number of atoms of each element in a compound, but not the actual number of atoms or the molecular structure. Empirical formulas are often determined by experimental data, such as the mass percentages of each element in the compound, and they are useful for comparing the compositions of different compounds.

The molar mass of the empirical formula can be calculated as follows:

C3H2Cl:

3C = 3 x 12.01 g/mol = 36.03 g/mol

2H = 2 x 1.01 g/mol = 2.02 g/mol

1Cl = 1 x 35.45 g/mol = 35.45 g/mol

Total molar mass = 73.50 g/mol

Now we can calculate the molecular formula by dividing the molar mass of the compound by the molar mass of the empirical formula, and then multiplying each subscript in the empirical formula by this number:

Molecular mass / empirical mass = 147 / 73.50 = 2

C3H2Cl x 2 = C6H4Cl2

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142.20 is the boiling point of a solution made of 75.4g of urea (CH,N₂O) dissolved in 800. g of X.

Boiling point is the temperature at which a liquid boils and turns into a vapor. At the boiling point, the vapor pressure of the liquid is equal to the atmospheric pressure. The boiling point of a liquid is usually higher than its melting point, and the two points have different values for different substances.

The boiling point elevation of the solution can be calculated using the following equation:

ΔT = K*m

where K is the boiling point elevation constant and m is the molality of the solution.

To calculate the molality of the solution, we first need to calculate the moles of urea present in 75.4g.

75.4g of urea has a molar mass of 60.06 g/mol, so 75.4g of urea contains 1.25 moles.

Now, we can calculate the molality of the solution.

800 g of liquid X weighs 800 g/mol, so 800 g of liquid X contains 800 moles.

Therefore, the molality of the solution is 1.25 moles/800 moles, or 0.00156 moles/mol.

Now, we can calculate the boiling point elevation of the solution:

ΔT = K*m

ΔT = -2.43°C-kg-mol * 0.00156 moles/mol

ΔT = -0.038 °C

Therefore, the boiling point of the solution is 142.20.

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Answer:

2.625

Explanation:

The balanced chemical equation is needed to determine the mole-to-mole ratio of Fe to O.

4Fe + 3O2 -> 2Fe2O3

From the equation, 3 moles of O2 react with 4 moles of Fe. Therefore, the mole-to-mole ratio of O2 to Fe is 3:4.

To find how many moles of O2 are needed to react with 3.5 moles of Fe, we can use this ratio:

3.5 moles Fe × (3 moles O2 / 4 moles Fe) = 2.625 moles O2

Therefore, 2.625 moles of O2 are needed to react with 3.5 moles Fe.

The answer is:

Answer:

Hyponatremia

Explanation:

When too much water moves inside a cell, it can lead to a condition called hyponatremia, which is a condition of low sodium concentration in the blood. This can happen when an individual drinks excessive amounts of water, which dilutes the sodium content in the blood.

When the concentration of sodium in the blood decreases, water moves into the cells to try to balance the concentrations, causing the cells to swell. In the case of brain cells, the swelling can be particularly dangerous because the skull limits the space available for the swelling, leading to increased pressure inside the skull. This can result in symptoms such as headaches, nausea, seizures, and even coma in severe cases.

In addition to the swelling of cells, hyponatremia can also lead to other complications such as electrolyte imbalances and impaired nerve and muscle function. Therefore, it is important to maintain a balance of fluid intake and electrolyte levels to prevent hyponatremia and other related conditions.

Answer: A cell placed into a hypotonic solution will swell and expand until it eventually burst through a process known as cytolysis.In hypotonic solutions, there is a net movement of water from the solution into the body. A cell placed into a hypotonic solution will swell and expand until it eventually burst through a process known as cytolysis.

Explanation: In hypotonic solutions, there is a net movement of water from the solution into the body. A cell placed into a hypotonic solution will swell and expand until it eventually burst through a process known as cytolysis.

The inorganic compound that is created by the removal or replacement of one, two, or all three hydrogen atoms in phosphoric acid and is commonly used in fertilizers and detergents, as well as a major cause of water pollution, is called "phosphate."

What do you mean by inorganic compound?

An inorganic compound is a chemical compound that does not contain carbon-hydrogen (C-H) bonds, which are the defining characteristic of organic compounds. Inorganic compounds can be composed of a variety of elements, including metals, non-metals, and metalloids.

The inorganic compound that is created by the removal or replacement of one, two, or all three hydrogen atoms in phosphoric acid and is commonly used in fertilizers and detergents, as well as a major cause of water pollution, is called "phosphate."

Phosphate compounds are essential nutrients for plant growth and are often added to fertilizers to improve soil fertility. However, when excess phosphate is added to water bodies, it can lead to eutrophication, a process where an excessive growth of algae and other aquatic plants occur, ultimately leading to oxygen depletion and harm to aquatic life.

Phosphates are also commonly used in detergents to aid in cleaning, but they can have similar negative impacts on water quality if they are not properly treated before being discharged into waterways. Therefore, regulations are in place to limit the amount of phosphate that can be added to detergents and other products in many countries to mitigate water pollution.

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This is most likely caused by a through-space interaction in compound isoborneol between one of the geminal methyl groups and the hydroxide, which is pointing upwards.

Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.

Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:

1)Molecular compounds where in atoms are joined by covalent bonds.

2) ionic compounds where atoms are joined by ionic bond.

3)Inter-metallic compounds where atoms are held by metallic bonds

4) co-ordination complexes where atoms are held by co-ordinate bonds.

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The label that belongs in the region marked X is "Moves molecules" because both active transport and passive transport involve the movement of molecules across a cell membrane.

Active transport and passive transport are two different mechanisms by which molecules move across a cell membrane. The key differences between active and passive transport are:

Energy requirement: Active transport requires energy, usually in the form of ATP, to move molecules across the cell membrane. In contrast, passive transport does not require energy and moves molecules down their concentration gradient.

Concentration gradient: Active transport moves molecules against their concentration gradient, from an area of low concentration to an area of high concentration, while passive transport moves molecules down their concentration gradient, or the change in concentration from one place with high concentration to another.

Specificity: Active transport often involves carrier proteins or pumps that are specific to certain molecules or ions, whereas passive transport usually involves channels or transporters that are less specific.

Rate of transport: Active transport can move molecules at a faster rate than passive transport, which is limited by the diffusion rate across the membrane.

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The diagram for question is attached below:

Therefore, the percent composition of carbon in acetic acid is 40.0%.

Acetic acid is a colorless, pungent liquid with a strong, sour smell. It is also known as ethanoic acid and has the chemical formula CH3COOH. Acetic acid is an organic acid that occurs naturally in some foods and is the main component of vinegar. Acetic acid is widely used in various industries, including food, medicine, and chemical production. In the food industry, it is used as a preservative and flavoring agent, and it is also used to produce pickles, mustard, and mayonnaise. In the medical industry, it is used in the production of medications, such as aspirin and antibiotics. Acetic acid is also used in the production of various chemicals, including plastics, solvents, and dyes.

Here,

The molecular formula of acetic acid is CH3COOH, which means it contains 2 carbon atoms. To determine the percent composition of carbon in acetic acid, we need to calculate the molar mass of the compound and the mass of the carbon atoms in it.

The molar mass of acetic acid is:

1 x 12.01 g/mol (C) + 2 x 1.01 g/mol (H) + 2 x 16.00 g/mol (O) = 60.05 g/mol

The mass of the carbon atoms in acetic acid is:

2 x 12.01 g/mol (C) = 24.02 g/mol

To calculate the percent composition of carbon in acetic acid, we divide the mass of the carbon atoms by the molar mass of the compound and multiply by 100:

(24.02 g/mol / 60.05 g/mol) x 100% = 40.0%

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As the formation of HF is an exothermic reaction, the temperature of the surroundings would increase.

An exothermic reaction is defined as a chemical reaction which involves release of energy in the form of light,heat .In these reactions, energy is transferred from system to surroundings rather than taking energy from surroundings into system as in endothermic reactions.

In an exothermic reaction,change in enthalpy is negative.Therefore, it can be inferred that net amount of energy which is required to start the exothermic reaction is less than the net amount which is released by the reaction.

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Answer:

Dinitrogen Tetrachloride

Explanation:

The compound N2Cl4 is made up of two nitrogen atoms and four chlorine atoms, so it is a molecular compound.

To name molecular compounds, we use prefixes to indicate the number of each type of atom in the compound. The prefix for two is "di", and for four is "tetra". Therefore, the name of N2Cl4 would be dinitrogen tetrachloride.

The mass of the ammonium chloride is 69.6 g

The freezing point is the temperature at which a liquid transitions into a solid at a given pressure. At the freezing point, the vapor pressure of the solid and the liquid phases of the substance are equal, and the substance transitions from a liquid phase to a solid phase as it releases heat.

We know that;

For glycine;

ΔT = K m i

2.8 = K * 169/75 * 1/1.5 * 1

2.8 = K * 1.5

K = 2.8/1.5

K = 1.86

Then;

If I have ammonium chloride;

Let the mass of the solute be m

2.8 = 1.86 * m/53 * 1/1.5 * 1.74

2.8 = 1.86 * m/79.5 * 1.74

2.8 = 3.2m/79.5

m = 2.8 * 79.5/3.2

m = 69.6 g

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The minimum moles of calcium chloride necessary to react with all of the unknown carbonate is 0.0026 mol.

Carbonate is a compound containing an anion of carbonate (CO3) and a cation of a metal, such as sodium, calcium, or magnesium. Carbonates are compounds of carbon and oxygen, and are found in many mineral forms, including limestone, marble, chalk, and dolomite. Carbonates are widely used in the construction, food processing, and chemical industries, and are also important components of soil and sediments.

The first step is to calculate the number of moles of carbonate present in the sample. This is done by dividing the mass of the sample by the molar mass of the carbonate:

0.335 g / 127.330 g/mol = 0.0026 mol

Next, we need to calculate the moles of calcium chloride needed to react with all of the carbonate. Since the reaction is a 1:1 ratio, we need the same number of moles of calcium chloride as the moles of carbonate present in the sample:

0.0026 mol CaCl2 = 0.0026 mol

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To calculate the number of molecules in a substance, we need to know the mass of the substance and its molar mass, and use the Avogadro's number.

The molar mass of C4H8O2 can be calculated by adding the atomic masses of all the atoms in the molecule. The atomic masses of C, H, and O are approximately 12, 1, and 16 respectively. So,

Molar mass of C4H8O2 = (4 × 12.01 g/mol) + (8 × 1.01 g/mol) + (2 × 16.00 g/mol)

= 72.10 g/mol

Now, we can use the following formula to calculate the number of molecules in 38.8 g of C4H8O2:

Number of molecules = (mass of substance / molar mass) x Avogadro's number

where Avogadro's number is approximately 6.022 × 10^23 molecules per mole.

Substituting the values, we get:

Number of molecules = (38.8 g / 72.10 g/mol) x (6.022 × 10^23 molecules/mol)

= 1.03 × 10^23 molecules

Therefore, there are approximately 1.03 × 10^23 molecules in 38.8 g of C4H8O2.

Answered By Unish ©

Verified Answer ✅

Answer:

2AlCl3 to 3Cl2

Explanation:

This is balanced equation: 2AlCl3 + 3Br2 => 2AlBr3 + 3Cl2

with 2 Al, 6 Cl and 6 Br

So 2AlCl3 to 3Cl2

8.5 g is the mass of something like the ammonia (in g) 3.01 x 1023 sodium atoms.

The most common alkali metal & sixth most abundant element on the world, sodium compensates 2.8 percent of a crust of the Earth. As opposed to sodium alone, sodium salts are much more beneficial. The most often used sodium component in common salt is sodium chloride. In the winter, it is used to de-ice roads and flavour food.

Ammonia produced from industry is used as fertiliser in agriculture to the tune of 80%.Ammonia is also used to create polymers, explosives, textiles, pesticides, dyes, and other compounds in addition to its various applications. Moreover, it is utilised to clean water sources.

No. of molecules of the Ammonia =3.01×10

23

Molar Mass of the Ammonia =17g/mole.

Using the Formula,

No. of Molecules =Mass/Molar Mass×Avogadro

s Number.

⇒3.01×10

23

=Mass/17×6.022×10

23

Mass=

2

17

∴Mass=8.5 g.

Hence, the Mass of the Ammonia is 8.5 g.

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The molar mass we calculated, 17.92 g/mol, is much lower than the molar mass of CO2, so it is unlikely that the gas is CO2.

Rate of effusion is the measure of the speed at which a gas escapes through a tiny opening, such as a small hole or a porous barrier, into a vacuum or another region of lower pressure. The rate of effusion is determined by the average speed of the gas particles and the size of the opening through which they pass. The rate of effusion of a gas is inversely related to the square root of its molar mass, according to Graham's law of effusion.

The square root of a gas's molar mass has an inverse relationship with the rate of effusion of that gas. The rate of effusion is expressed as follows:

rate1/rate2 = sqrt(MM2/MM1)

where rate1 and rate2 are the rates of effusion of the two gases and MM1 and MM2 are their molar masses.

Using the given data, we can write:

rate1/rate2 = sqrt(MM2/MM1)

1/15 = sqrt(MM2/MMglucose)

1/12 = sqrt(MM2/MMN2)

Dividing these two equations, we get:

1/15 ÷ 1/12 = sqrt((MM2/MMglucose)/(MM2/MMN2))

4/5 = sqrt(MMglucose/MMN2)

Squaring both sides, we get:

16/25 = MMglucose/MMN2

MMglucose = (16/25) x 28 = 17.92 g/mol

The molar mass of glucose is 180 g/mol. The gas evolved from the fermentation of glucose is mainly carbon dioxide (CO2), so the molar mass of the gas is close to the molar mass of CO2, which is 44 g/mol. The molar mass we calculated, 17.92 g/mol, is much lower than the molar mass of CO2, so it is unlikely that the gas is CO2.

A possible gas that could be produced from the fermentation of glucose is methane (CH4). The molar mass of methane is 16 g/mol, which is closer to the molar mass we calculated. Therefore, the gas evolved from the fermentation of glucose could be methane.

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The static temperature and stagnation pressure of the flow are 279.9K and 2.551bar respectively.

Stagnation pressure, also known as pitot pressure and total pressure in fluid dynamics as well as aerodynamics, is indeed the static pressure at a place where a fluid flow has stopped.

The fluid has no motion as well as all linear acceleration has indeed been transformed to pressure energy at such a stagnation point.

a)Po/p = (1+ (γ-1)M²/2)^γ/γ-1

substituting all the given values in the above equation, we get  

Po/2 = (1+ (1.4-1)0.6²/2)^1.4/1.4-1

Po =2.551bar

b)To/T = 1 +( γ-1/2)M²

substituting all the given values in the above equation, we get  

300/T = 1 +( 1.4-1/2)0.6²

T=279.9K

c)M=c/√γRT

0.6=c/√1.4×8.31×279.9

c=204.68

A =πD²/4

A =3.14×0.3²/4=0.07m²

m= ρAc

m= 1.90×0.07×204

   =27.16Kg/s

Therefore, the static temperature and stagnation pressure of the flow are 279.9K and 2.551bar respectively.

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The atomic radius of an atom is the distance between the centre of the nucleus and the valence shell of electrons. The correct order of atomic radius and ionization energy is F, O, S, and S, O, F. The correct option is C.

The minimum amount of energy required to remove most loosely bound electron from an isolated gaseous atom of that element in the ground state is called  ionization energy.

Along a period  ionization energy increases and decreases down the group. The atomic radius generally increases down a group and decreases along a period.

Here 'F' has high ionization energy and it has low atomic radius.

Thus the correct option is C.

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Omitting the anhydrous diethyl ether may cause the reaction to be incomplete, resulting in a lower yield of the desired product.

Anhydrous is a term used to refer to a substance that is without water. It is derived from the Greek words "a" meaning without and "hydor" meaning water. Anhydrous materials are often used in laboratory and industrial processes because they are more reactive than their hydrated (with water) counterparts. Anhydrous materials can also be found in everyday items such as food, beverages, and medicine.

(a) The use of solvent-grade diethyl ether may lead to poor product yields due to the presence of water in the solvent. The water present in the solvent can lead to side reactions and reduced product yields.

(c) Using diethyl ether, rather than petroleum ether, to remove biphenyl from the crude triphenylmethanol may lead to a decrease in product yields due to the higher boiling point of the diethyl ether.

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Answer:

The 20-year-old man's sister may be at risk of having a child with cystic fibrosis if that causes the condition. Cystic fibrosis is an inherited disorder caused by a mutation in the CFTR gene that affects the production of mucus in the body, leading to lung infections, digestive problems, and other complications. The disease is inherited in an autosomal recessive pattern, meaning that a person must inherit two copies of the defective gene (one from each parent) to develop the condition.

The man's advice to his sister to see a genetic counselor is likely motivated by his concern for her and the potential child's health. A genetic counselor is a healthcare professional who specializes in assessing and counseling individuals and families on the risks and implications of genetic conditions. A genetic counselor can provide the sister with information about her risk of being a carrier of the CFTR gene mutation and the likelihood of passing it on to her children. The counselor can also discuss the different options for testing and provide guidance on how to manage the risk of having a child with cystic fibrosis, such as through preconception or prenatal testing, genetic counseling, or assisted reproductive technologies.

The man's recommendation is in line with the current guidelines of many medical organizations, including the American College of Obstetricians and Gynecologists (ACOG), which recommend that individuals who have a family history of genetic disorders or are carriers of certain gene mutations should be offered genetic counseling and testing. This approach can help identify and manage the risk of having a child with a genetic disorder and provide support and education to families.

For the denser systems, we have to assume ideal mixture.

What does optimal gas mixing entropy mean?

In the special situation of ideal gases, this constant volume type of "mixing" is referred to in what is occasionally referred to as Gibbs' theorem. It claims that such a "mixing" of ideal gases has no entropy.

The mixing entropy formula discovered in the preceding issue can be used to calculate the mixing entropy of any ideal gas as well as some dense gases, liquids, and solids. We must assume for the denser systems that the two kinds of molecules are the same size and interact with one another similarly to molecules of the same type (same forces, etc.). An ideal mixture is the name given to such a setup.

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As the forces between each pair of charges will be equal in magnitude and opposite in direction for the force on charge 1 to match with force on charge 2 as when placed on line C , the force lines of charge 2 and 1 will match.

It should be noted that the diagram relating to the question had been attached.

For B, as the force due to charge 3 must be horizontal along D on charge 1 , and the force between 1 and 3 is attractive ,

the charge 3 must be placed at D

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5.50 g of magnesium will produce 5.50/24.30 g of magnesium oxide, which is 0.2265 g of magnesium oxide.

Magnesium is a chemical element and an abundant mineral in the Earth's crust. It is the eighth most abundant element in the Earth's crust, and the third most abundant in seawater. It is also found in many foods, and is an essential mineral for human health. Magnesium is involved in more than 300 metabolic reactions in the body and is important for muscle and nerve function, and healthy bones. It also helps regulate blood sugar levels, blood pressure, and the production of energy and protein.

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The density of the ice is approximately 1.09 g/mL and its specific gravity is approximately 1.09.

First, we need to convert the volume of water from milliliters to grams. The density of water at 4°C is 1 g/mL. Therefore, the mass of the water is:

mass = volume × density = 50 mL × 1 g/mL = 50 g

Next, we can use the conservation of mass to find the mass of the ice produced. The mass of the ice must be equal to the mass of the water, so:

mass of ice = mass of water = 50 g

Now, we can find the density of the ice:

density = mass of ice ÷ volume of ice = 50 g ÷ 46 mL ≈ 1.09 g/mL

Finally, we can find the specific gravity of the ice by comparing its density to the density of water. Since the density of water at 4°C is 1 g/mL, the specific gravity of the ice is:

specific gravity = density of ice ÷ density of water = 1.09 g/mL ÷ 1 g/mL ≈ 1.09

Therefore, the density of the ice is approximately 1.09 g/mL and its specific gravity is approximately 1.09.

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Answer:

Below

Explanation:

"has its volume increased 42 L"     <===so final volume is 48+28 (as written)

P1V1 / T1   = P2V2 / T2        T must be in Kelvin (add 273.15 to °C)

Looking for P1

Re-arrange

P1 = P2 V2 / T2   * T1 / V1    sub in the values

P1 = (2)(42+28) / (47+ 273.15) * (85+273.15) /(28)

P1 = 5.59  atm

Given that it is extremely simple to lose electrons, the majority of transition metals have numerous oxidation states.

The oxidation state, often known as the oxidation number, in chemistry refers to the hypothetical charge that an atom would have if all of its links to other atoms were entirely ionic. It describes how much an atom has oxidized (lost electrons) in a chemical complex. The oxidation state might theoretically be positive, negative, or zero.

Although losing electrons from transition metals is easier than from alkali metals or alkaline earth metals, most transition metals possess numerous oxidation states. Alkali metals nearly invariably contain ions with oxidation states of one because they have one electron within their valence s-orbital.

Therefore, given that it is extremely simple to lose electrons, the majority of transition metals have numerous oxidation states.

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169.2K is the equilibrium temperature of the system after the insulating wall is removed.

Generally speaking, a condition of equilibrium is one in which nothing is changing. A body in equilibrium won't undergo any energy exchanges, either positive or negative. Equilibrium is defined significantly differently in biology, physics, and chemistry.

Yet the underlying idea is the same. A body in balance will be least affected by outside influences. Even when external pressures are present, the opposing forces often have a balanced impact on the item under consideration.

for gas, n1=1mol

               T1= 148K

for solid,n2=2mol

            T2=178K

for conservation of energy, ΔQ= Qgas+ Qsolid=0

Q= CvΔT

0=Cvgas(Teql-148) + Cvsolid(Teq-178)

0= 5/2×1×R(Teql-148) + 3×2×R(Teq-178)

Tequi= 169.2K

Therefore, 169.2K is the equilibrium temperature of the system after the insulating wall is removed.

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The balanced equation for the coupling reaction of bromobenzene on the metal surface to form biphenyl is mentioned below.

The coupling reactions are a class of chemical reactions where unification of two or more hydrocarbons coupled  with the help of a metal catalyst.

(a) The balanced equation for the coupling reaction of bromobenzene on the metal surface to form biphenyl is:

2C₆H₅Br + 2Na → (C₆H₅)₂ + 2NaBr

(b) The balanced equations for the reactions of phenylmagnesium bromide and trityl fluoborate with water are:

PhMgBr + H₂O → PhH + MgBrOH

Trityl fluoborate + H₂O → Trityl alcohol + HBF₄

Therefore, the balanced equations are given above.

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Answer:

Cu 2+ (aq) in CuSO4 (aq)

Explanation:

In the reaction between zinc metal and copper (II) sulfate solution, the zinc metal is oxidized and loses electrons to form zinc ions, Zn^2+, which go into the solution as zinc sulfate, ZnSO4. The copper (II) ions, Cu^2+, in copper (II) sulfate solution is reduced and gain the electrons that the zinc metal lost, forming solid copper metal, Cu(s).

So the substance receiving electrons in this reaction is the copper (II) ions, Cu^2+, in CuSO4 solution, which gets reduced to form copper metal.