1. Calcutate the mass of Sliver deposited
at the Cathode during the electrysis of
Nitrate (AgNO3) Solution, H,
bliver
CL use of
of
Current
DIO

The release of heat energy and the formation of water (H2O) indicate a release of bond energy.

Heat energy is the energy transferred between two objects or systems that have different temperatures. It is a form of energy that is created when molecules move faster, creating kinetic energy in the form of heat. Heat energy is transferred by conduction, convection, and radiation. Conduction is the transfer of heat energy through direct contact between two objects. Convection is the transfer of heat energy through the movement of a fluid, such as air or water. Radiation is the transfer of heat energy through electromagnetic waves. Heat energy is used in many applications, including cooking, heating, and power generation.

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Granulocytes are leukocytes that have visible granules and agranulocytes are leukocytes that don't have visible granules.

Leukocytes, widely known as white blood cells, are blood cells that lack haemoglobin, have nucleus, and can move. They protect the body from disease and infection by swallowing foreign objects and cell debris, eradicating infectious agents, killing cancer cells, or manufacturing antibodies. Bone marrow produces white blood cells, and organs like the kidneys, liver, and spleen control how much of them are generated at any given time.

The two categories of white blood cells, are granulocytes and agranulocytes.

Agranulocytes lack cytoplasmic granules or sacs, whereas granulocytes do. In the battle against infection and disease, each type of granulocyte and agranulocyte serves different function.

Basophils, neutrophils, and eosinophils are the three different types of granulocytes.

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Yes, the Changes in temperature, pressure, and volume affect the behavior of gases more than they affect solids and liquids.

As the temperature will changes, the internal energy of the material will also changes.  It will changes by the same amount in the gases or solids or the liquids.  It is the function of the temperature. Volume of  The solid does not change as much when the lot of pressure is applied.

The Pressure changes in the gases will changes the temperature and the volume a lot.  The pressure changes in the  liquids and the solids does not change them much.  This is because of the reason that the stronger bonds in between the neighboring molecules in the liquids and the solids.  In gases these attractions are very less.

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This question is incomplete question , the complete question is :

Do Changes in temperature, pressure, and volume affect the behavior of gases more than they affect solids and liquids ?

Answer:

when 445 grams of H2O are reacted, 4,300 grams (or 4.3 kilograms) of MnO2 are produced.

Explanation:

The balanced chemical equation for the reaction is:

16H+ (aq) + 2MnO4- (aq) + 10Br- (aq) → 2MnO2 (s) + 5Br2 (aq) + 8H2O (l)

According to the equation, 2 moles of MnO4- react to produce 2 moles of MnO2. Therefore, we need to find out the number of moles of MnO4- that react with the given amount of H2O and then use stoichiometry to calculate the number of moles of MnO2 produced.

First, let's calculate the number of moles of H2O:

mass of H2O = 445 g

molar mass of H2O = 18.015 g/mol

number of moles of H2O = mass/molar mass = 445 g/18.015 g/mol = 24.7 mol

From the balanced equation, we can see that 1 mole of H2O reacts with 2 moles of MnO4-. Therefore, the number of moles of MnO4- required to react with 24.7 mol of H2O is:

number of moles of MnO4- = 2 × number of moles of H2O = 49.4 mol

Since 2 moles of MnO4- produce 2 moles of MnO2, we can say that 1 mole of MnO4- produces 1 mole of MnO2. Therefore, the number of moles of MnO2 produced is also 49.4 mol.

Finally, we can calculate the mass of MnO2 produced:

mass of MnO2 = number of moles of MnO2 × molar mass of MnO2

mass of MnO2 = 49.4 mol × 86.94 g/mol = 4,300 g

Therefore, when 445 grams of H2O are reacted, 4,300 grams (or 4.3 kilograms) of MnO2 are produced.

Carbon monoxide ( CO ) is toxic because binds more strongly to the iron in the hemoglobin ( Hb ) than  oxygen ( O₂ ). The equilibrium constant K at 298 K is 56.59.

The chemical equation is as :

Hb   +   O₂     ⟶  HbO₂     ΔG∘ 1 = +70 kJ/mol

Hb   +   CO  ⟶  HbCO      ΔG∘ 2 = −80 kJ/mol

HbO₂  + CO  ---> HbCO  +  O₂      ΔG∘ 3 = ?

ΔG∘ 3 = (+ 70 - 80  ) kJ/mol

ΔG∘ 3 = - 10 kJ/mol

ΔG∘ 3 = - RT ln K

ΔG∘ = standard Gibbs free energy  = -10kJ/mol = -10000 J/mol

R = gas constant = 8.314 J/K.mol

T = temperature = 298 K

k = equilibrium constant  = ?

- 10000 J/mol = - (8.314 J/kmol ) × 298 × ln eq

K = 56.59

Thus, the equilibrium constant Ka is  56.59.

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This question is incomplete, the complete question is :

Carbon monoxide (CO) is toxic because it binds more strongly to the iron in hemoglobin (Hb) than does oxygen (O2), as indicated by these approximate standard free-energy changes in blood:

reaction A:reaction B:Hb+O2Hb+CO⟶⟶HbO2,HbCO, ΔG∘=−70 kJ/mol ΔG∘=−80 kJ/mol

Estimate the equilibrium constant K at 298 K for the equilibrium

HbO2  + CO⇌HbCO+O2

To determine how different medicines will affect her, the lab tested several genes that contain coding for certain traits, including allergies to medications. This genetic material is on structures called chromosomes that get passed on from generation to generation.

To determine how different medicines will affect a person, genetic testing can be conducted to analyze specific traits and potential allergies to certain medications.

In the context of genetic testing, chromosomes are typically analyzed to look for genetic variations or mutations that may impact the way an individual metabolizes certain medications.

The genetic material that contains information about traits and allergies is carried on structures called genes, which are located on chromosomes.

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The concept Arrhenius equation is used here to determine the frequency factor for the reaction. Here for the given reaction, the frequency factor is 3.814.

The Arrhenius equation explains the relationship between the activation energy and rate of the reaction. The lower the activation energy, higher will be the rate of reaction. The equation is:

[tex]k=A . e^{-E_{a} } / RT[/tex]

k - rate constant

A - frequency factor

Eₐ - activation energy

R - Gas constant

T - Temperature in Kelvin

261 kJ per mole = 261000 J/mol

325°C + 273 = 598 K

6.1 × 10⁻⁸ = A . e⁻261000/ 8.314 × 598

A = 3.814

Thus the frequency factor for the reaction is 3.814.

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C. Weak acids are only partially ionized in an aqueous solution. When a weak acid is dissolved in water, only a fraction of the acid molecules will donate a proton to water to form hydronium ions, resulting in a solution with a lower concentration of hydronium ions and a higher pH compared to a strong acid with the same concentration.

What is Aqueous Solution?

An aqueous solution is a solution in which the solvent is water. In such a solution, water molecules surround and interact with the solute ions or molecules. Aqueous solutions are very common in nature and are widely used in chemistry, biology, and industry. For example, the fluids in our bodies are aqueous solutions, and many chemical reactions occur in aqueous solutions. The properties of aqueous solutions, such as their acidity or alkalinity, electrical conductivity, and freezing point, depend on the nature and concentration of the solute dissolved in the water.

Weak acids are substances that do not completely dissociate into ions in aqueous solutions. Instead, they exist as a mixture of ions and undissociated molecules in a dynamic equilibrium. This means that only a fraction of the acid molecules dissociate into their respective ions, while the rest remain undissociated.

Because of this partial dissociation, waek acids are not strong sources of hydronium ions (H3O+), which determine the pH of a solution. Instead, they provide a buffer system that can help resist changes in pH when small amounts of acid or base are added to the solution.

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The molecular formula of a compound is the whole number multiple of its empirical formula. The empirical formula of the unknown compound is CH₂O₂.

The empirical formula of a compound can be defined as the formula which gives the simplest whole number ratio of atoms of various elements present in one molecule of the compound.

The molecular formula of a compound gives the actual number of atoms of various elements present in one molecule of the compound.

Moles, n = Given mass / Molar mass

'n' of C = 0.3911 / 12 = 0.032

'n' of H = 0.0654 / 1 = 0.0654

'n' of O = 1.0437 / 16 = 0.0652

Divide'n' values by 0.03 to get whole numbers.

C = 1

H = 2

O = 2

Thus the empirical formula of the compound is CH₂O₂.

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14 mole  of Fe will react with 9.3 mole of oxygen and produce 4.2mole of Fe[tex]_3[/tex]O[tex]_4[/tex]. The mole signifies  6.022×10²³ units, which is a very big quantity.

In chemistry, a mole, sometimes spelt mol, is a common scientific measurement unit for significant amounts of extremely small objects like atoms, molecules, and other predetermined particles. The mole signifies  6.022×10²³ units, which is a very big quantity.

Under the International System of Units (SI), the mole is defined as this quantity as of May 20, 2019, according the General Conference upon Weights and Measurements. The amount of atoms discovered via experimentation to be present in 12 kilograms of carbon-12 was originally used to define the mole. 

3 Fe + 2 O[tex]_2[/tex]→ Fe[tex]_3[/tex]O[tex]_4[/tex]

The ratio among Fe, oxygen and Fe[tex]_3[/tex]O[tex]_4[/tex] is 3:2:1

1 mole of Fe reacts with 2/3mole of oxygen

14 mole of Fe reacts with (2/3)×14=9.3 mole of oxygen

1 mole of Fe reacts with 1/3mole of Fe[tex]_3[/tex]O[tex]_4[/tex]

14 mole  of Fe reacts with (1/3)×14=4.2mole of Fe[tex]_3[/tex]O[tex]_4[/tex]

Therefore, 14 mole  of Fe will react with 9.3 mole of oxygen and produce 4.2mole of Fe[tex]_3[/tex]O[tex]_4[/tex].

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In comparison to cyclohexane, those following will be much more soluble in water.

The majority of cyclohexane is used to make thermoplastic intermediates and other typical uses for nylon, including garments, tents, and carpets. In recent years, benzene has been replaced by cyclohexane in many applications and is still utilized as a solvent in industrial and chemical operations.

Consuming cyclohexane could upset your stomach. At cyclohexane concentrations typically present in the environment, these effects are unlikely to manifest. The skin may become irritated if cyclohexane is spilled on it. Skin dryness and cracking may result from prolonged or repetitive skin contact.

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Option (d) is correct. The total number of grams of sodium hydroxide needed to make 1. 0 liter of a 0. 20 m solution is 8.0 gram. It is calculated using the expression of molarity.  

Molarity is defined as the ratio of solute moles and solution length. We can obtain the acid solution molarity by dividing the amount of moles  of the solution in which it was dissolved. It is a measure of the concentration of a chemical species, in particular of a solute in a solution in terms of amount of substance per unit volume of solution. It can be expressed as,

Molarity = Moles / volume in liter

So the moles of sodium hydroxide = 0.2 mole

The Mole of sodium hydroxide is 0.2 mole and Molar mass of sodium hydroxide is 40 g/mole. We have to determine the mass of sodium hydroxide.

Mass is the product of the moles and the molar mass. It can be expressed as,

mass = moles * molar mass

          = 0.2 * 40

          = 8 gram

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The complete question is,

What is the total number of grams of NaOH (formula mass = 40.) needed to make 1.0 liter of a 0.20 M solution?

(1) 20. g (2) 2.0 g (3) 80. g (4) 8.0 g​

The pH at the equivalence point in the titration of 50.0 ml of 0.300 M CH₃COOH with 0.3 M NaOH is 8.61.

At the equivalence point in the titration of CH₃COOH with NaOH, the pH is determined by the hydrolysis of the salt formed, which is CH3COO⁻ and Na+.

The equation for the hydrolysis reaction is:

CH3COO⁻ + H2O ⇌ CH3COOH + OH⁻
We can use the Ka value for CH₃COOH to find the Kb value for CH3COO⁻ using the equation:

Kw = Ka x Kb

Where Kw is the ion product constant for water (1.0 x 10⁻¹⁴).
Kb = Kw/Ka

= (1.0 x 10⁻¹⁴)/(1.8 x 10⁻⁵)

= 5.56 x 10⁻¹⁰
Now we can use the Kb value to find the concentration of OH⁻ at the equivalence point using the equation:

Kb = ([OH⁻][CH3COOH])/[CH3COO⁻].

Since the concentrations of CH3COOH and CH3COO⁻ are equal at the equivalence point, we can simplify the equation to Kb = ([OH⁻]²)/[CH₃COO⁻].
Hence,
[OH-] = [tex]\sqrt{Kb(CH3COO-)}[/tex]

=[tex]\sqrt{5.56(10^{-10})(0.3) }[/tex]

= 4.06 x 10⁻⁶ M
Use the concentration of OH⁻ to find the pH at the equivalence point using the equation pOH = -log[OH-] and the relationship pH + pOH = 14.
pOH = -log(4.06 x 10⁻⁶)

= 5.39
pH = 14 - 5.39

= 8.61
Therefore, the pH at the equivalence point in the titration of 50.0 ml of 0.300 M CH3COOH with 0.3 M NaOH is 8.61.

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The 125 moles of NaCl or sodium chloride solution in 4 l solution will have molarity 31.25 M.

The molarity of any solution is given by the formula - Molarity = number of moles ÷ volume of solution in litres.

In this question, we have the required values which are number of moles and volume of solution in litre. Therefore, keeping the values in formula to find the molarity of solution.

Molarity = 125/4

Now perform the division of values stated on Right Hand Side of the above mentioned equation

Molarity = 31.25 M

Thus, the molarity of solution is 31.25 M.

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The freezing point depression table is filled as follows:

1. Solution = Sucrose

Lowest Temperature °C = -7.9

1st Trial °C Freezing Point = -1.6

2nd Trial °C Freezing Point = 1.6

ΔTf °C = 1.6

2. Solution = Water

Lowest Temperature °C = -8.0

1st Trial °C Freezing Point = 0.0

2nd Trial °C Freezing Point = 0.0

ΔTf °C = 0.0

Freezing point depression is a phenomenon that occurs when the freezing point of a solvent is lowered by the presence of a solute.

When a solute is dissolved in a solvent, the solute molecules or ions occupy the spaces between the solvent molecules. This makes it harder for the solvent molecules to form a solid lattice structure, which is required for freezing, and as a result, the freezing point of the solvent is lowered.

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The solubility of the solute in the solvent depends on intermolecular interactions.

The nature of the solute and the solvent alone determines how soluble they are in a solvent. In a polar solvent, a polar solute dissolves. In a non-polar solvent, a polar solute is poorly soluble. In a non-polar solvent, a non-polar solute dissolves.

Since the question is incomplete, we can not see what the solute or the solvent ought to have been. However, we must know that the solubility of the solute in the solvent must depend on intermolecular interactions between the both.

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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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917Kg/m³ is the density of 50,000 m³ iceberg of mass of 45,850,000kg. Grams per cubic centimeter are a typical unit of measurement for density.

Density is the mass of a specific material per unit volume. d = M/V, in which d is density, M is weight, and V is volume, is the formula for density. Grams per cubic centimeter are a typical unit of measurement for density. For instance, whereas Earth has a density of 5.51 grams per square centimeter, water has a density of 1 gram per cubic centimeter.

Another way to state density is in kilograms per cubic meter. For instance, air weighs 1.2 pounds per cubic metre. In textbooks and manuals, the densities of typical solids, liquids, as well as gases are stated.

density= mass/ volume

         = 45,850,000 /50,000

         = 917Kg/m³

Therefore, 917Kg/m³ is the density of 50,000 m³ iceberg of mass of 45,850,000kg.

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The heat capacity is obtained from; c= q/mdT

Specific heat is the amount of heat energy required to raise the temperature of one unit mass of a substance by one degree Celsius (or one degree Kelvin) without a change in state. It is a property of a substance that depends on its chemical composition and molecular structure.

The specific heat of a substance is usually measured in units of joules per kilogram per degree Celsius (J/kg°C) or in calories per gram per degree Celsius (cal/g°C). The specific heat of a substance can be measured experimentally by heating a known mass of the substance and measuring the amount of heat energy required to raise its temperature by a certain amount.

Since the question is incomplete and the values are missing, We can see that the specific heat can be obtained when it is made the subject of the formula as shown below.

We now know that;

q=mcdT

Then c is obtained from;

c= q/mdT

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-1113.5kJ is the theoretical enthalpy of combustion.

What makes energy different from enthalpy?

The entire amount of heat energy that is either absorbed or released in a thermodynamic system is measured by enthalpy. Internal energy denotes all of the potential or moving energy present in a thermodynamic system.

Enthalpy of combustion is the term used to describe the change in a system's enthalpy that occurs when one mole of a substance fully burns in oxygen or air at a specific temperature.

C₂H5OH()+302(g) → 2CO2(g) + 3H₂O(1)

Reactants:

5 C-H : 5*412

1 C-C : 348

1 C-O: 358

3 O=O: 3* 496

1 O-H: 463

Products:

2*2 C=O : 4*743

2*3 O-H: 6*463

Enthalpy of Vaporization (kJ mol-¹) for :

Ethanol 42.5

Water 41​

Enthalpy of combustion : (5*412 + 348 + 358 + 3* 496 + 463 + 42.5) - ( 3*41 + 4*743 + 6*463)    

                                        : -1113.5kJ

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To obtain  experimental measurements with maximum accuracy one should select a liquid with a larger value of Kf as there should be larger difference in depression in freezing point.

Accuracy  in terms of chemistry can be defined as to how close a measurement is to the true value.There are three types of accuracy:

1) Point accuracy-It means accuracy is present at that point of scale only.It does not give any information about the accuracy of the instrument.

2)Percentage of true value--It is the accuracy  which is determined by identifying accuracy of the instrument  and comparing it with the measured true value.

3)Percentage of scale range- It is the accuracy  which determines accuracy of the measurement.

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Answer:

2.637 L

Explanation:

The volume of oxygen O2 found in 41.1 grams of oxygen at STP can be calculated using the ideal gas law equation PV = nRT, where P is the pressure, V is the volume, n is the number of moles of oxygen, R is the ideal gas constant, and T is the temperature.

Using the molar mass of oxygen, which is 32 g/mol, we can calculate the number of moles of oxygen in 41.1 g of oxygen:

n = 41.1 g/ 32 g/mol = 1.28125 moles

At STP, the pressure is 101.325 kPa and the temperature is 273.15 K. Plugging these values into the ideal gas law equation gives us:

V = (1.28125 mol)(0.08206 L•atm/mol•K)(273.15 K) / (101.325 kPa) = 2.637 L

The expressions for the rates of appearance of I₂ and NO are d[I₂] /dt and d[NO]/ dt. This is according to the chemical equilibrium.

The rate of appearance is defined as a positive quantity. The rate of appearance of a product is equals to the rate of disappearance of a reactant. chemical equilibrium is defined as the state in which both the reactants and products are present in concentrations which have no further tendency to change with time. It is a condition in the course of a reversible chemical reaction in which no net change in the amounts of reactants and products occurs. A reversible chemical reaction is defined as the reaction in which the products as soon as they are formed, react to produce the original reactants.

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The complete question is,

Given the balanced chemical equation for the decomposition for INO, and the rate of disappearance of INO, write the expressions for the rates of appearance of I2 and NO.

2INO(g) → I2(g) + 2NO(g)

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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Therefore, the maximum theoretical yield of LiCl in moles is 0.0168 mol.

In the context of chemistry, a reaction refers to a process in which one or more substances, known as reactants, undergo a chemical change to form one or more new substances, known as products. During a chemical reaction, chemical bonds between atoms in the reactants are broken and new bonds are formed to create the products. Reactions can be classified into different types, including synthesis (combination), decomposition, single replacement, double replacement, and combustion reactions. The study of chemical reactions is fundamental to understanding the behavior of matter and its interactions in the natural world, as well as in many important practical applications, such as medicine, energy production, and materials science.

Here,

The unbalanced equation is:

Li2CO3 + HCl → LiCl + CO2 + H2O

To balance the equation, we need to add a coefficient of 2 in front of HCl:

Li2CO3 + 2HCl → 2LiCl + CO2 + H2O

The balanced equation tells us that 1 mole of Li2CO3 reacts with 2 moles of HCl to produce 2 moles of LiCl.

First, we need to calculate the number of moles of Li2CO3:

moles of Li2CO3 = mass / molar mass

moles of Li2CO3 = 0.62 g / 73.89 g/mol

moles of Li2CO3 = 0.0084 mol

According to the balanced equation, 1 mole of Li2CO3 produces 2 moles of LiCl. Therefore, the maximum theoretical yield of LiCl can be calculated as follows:

moles of LiCl = 2 × moles of Li2CO3

moles of LiCl = 2 × 0.0084 mol

moles of LiCl = 0.0168 mol

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The number of atoms of titanium in 1.67 moles of each compound is calculated below.

We can use Avogadro's number to convert moles of each compound to the number of atoms of titanium in each compound. Avogadro's number is approximately 6.022 x 10^23 particles per mole.

FeTiO3 contains one atom of titanium per formula unit.

Number of moles of ilmenite = 1.67 mol

Number of atoms of titanium in 1.67 mol of ilmenite = 1.67 mol x (6.022 x 10^23 atoms/mol) = 1.005 x 10^24 atoms of titanium.

TiCl4 contains one atom of titanium per molecule.

Number of moles of TiCl4 = 1.67 mol

Number of molecules of TiCl4 in 1.67 mol = 1.67 mol x (6.022 x 10^23 molecules/mol) = 1.006 x 10^24 molecules

Number of atoms of titanium in 1.67 mol of TiCl4 = 1.006 x 10^24 molecules x 1 atom/molecule = 1.006 x 10^24 atoms of titanium.

One molecule of Ti3O5, there are 3 titanium atoms and 5 oxygen atoms.

Number of titanium atoms in 1.67 moles of Ti3O5 = (3 Ti atoms/molecule) x (1.67 moles) x (6.022 × 10^23 atoms/mole) = 1.0 x 10^24 Ti atoms.

One molecule of Ti2O3, there are 2 titanium atoms and 3 oxygen atoms.

Number of titanium atoms in 1.67 moles of Ti2O3 = (2 Ti atoms/molecule) x (1.67 moles) x (6.022 × 10^23 atoms/mole) = 2.0 x 10^24 Ti atoms

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Answer:

Explanation:

u arevery call

Both chemical reactions X and Y are possible because there are two reactants and one product in synthesis reaction

What is true about synthesis reaction?

When two or more reactants are present, a synthesis reaction produces a single product that is more complex than the initial reactants.

This kind of reaction is described by the general equation A + B = AB. Synthesis reactions are those in which two reactants combine to form a chemical. Synthesis reactions involve the chemical mixing of two or more substances to create a single compound or end product.

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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.