Chapter 3, Problem 3.62P

(a)

Interpretation Introduction

Interpretation:

A balanced chemical equation for the reaction between gallium metal and oxygen gas to form solid $\text{gallium}\left(\text{III}\right)\text{oxide}$ is to be written.

Concept introduction:

In a balanced chemical equation, the total mass of reactants and products are equal in a balanced chemical equation, thus, it obeyed the law of conservation of mass. Also, the amount of substances in a balanced chemical reaction are stoichiometrically equivalent to each other.

Following are the steps to determine the moles of a chemical substance when the moles of another chemical substance present in the chemical reaction are given,

Step 1: Write the names and molecular formulas of the substances involved in the chemical reaction.

Step 2: Write the balanced chemical equation by using stoichiometric coefficients.

Step 3: Determine the molar ratio from the balanced chemical reaction between the chemical substance whose amount is given and the chemical substance whose amount is to be calculated.

Step 4: Use the molar ratio and the given amount to calculate the unknown amount of the other substance.

(b)

Interpretation Introduction

Interpretation:

A balanced chemical equation for the combustion reaction of liquid hexane to form carbon dioxide gas and gaseous water is to be written.

Concept introduction:

In a balanced chemical equation, the total mass of reactants and products are equal in a balanced chemical equation, thus, it obeyed the law of conservation of mass. Also, the amount of substances in a balanced chemical reaction are stoichiometrically equivalent to each other.

Following are the steps to determine the moles of a chemical substance when the moles of another chemical substance present in the chemical reaction are given,

Step 1: Write the names and molecular formulas of the substances involved in the chemical reaction.

Step 2: Write the balanced chemical equation by using stoichiometric coefficients.

Step 3: Determine the molar ratio from the balanced chemical reaction between the chemical substance whose amount is given and the chemical substance whose amount is to be calculated.

Step 4: Use the molar ratio and the given amount to calculate the unknown amount of the other substance.

(c)

Interpretation Introduction

Interpretation:

A balanced chemical equation for the reaction between calcium chloride and sodium phosphate to form solid calcium phosphate and sodium chloride in the solution is to be written.

Concept introduction:

In a balanced chemical equation, the total mass of reactants and products are equal in a balanced chemical equation, thus, it obeyed the law of conservation of mass. Also, the amount of substances in a balanced chemical reaction are stoichiometrically equivalent to each other.

Following are the steps to determine the moles of a chemical substance when the moles of another chemical substance present in the chemical reaction are given,

Step 1: Write the names and molecular formulas of the substances involved in the chemical reaction.

Step 2: Write the balanced chemical equation by using stoichiometric coefficients.

Step 3: Determine the molar ratio from the balanced chemical reaction between the chemical substance whose amount is given and the chemical substance whose amount is to be calculated.

Step 4: Use the molar ratio and the given amount to calculate the unknown amount of the other substance.