Chapter 9, Problem 4RQ

(a)

Interpretation Introduction

Interpretation:

The given statement is correct or incorrect has to be given.

The given statement is,

Three moles of oxygen is required for 2 moles of ammonia.

(b)

Interpretation Introduction

Interpretation:

The given statement is correct or incorrect has to be given.

The given statement is,

Twelve moles of hydrogen cyanide are produced for every sixteen moles of oxygen that react.

(c)

Interpretation Introduction

Interpretation:

The given statement is correct or incorrect has to be given.

The given statement is,

The mole ratio between the water and methane is $\frac{\text{6}\text{mol}{\text{H}}_{\text{2}}\text{O}}{\text{2}\text{mol}{\text{CH}}_{\text{4}}}.$

(d)

Interpretation Introduction

Interpretation:

The given statement is correct or incorrect has to be given.

The given statement is,

When $\text{12}\text{mol}\text{HCN}$ are produced $\text{4}\text{mol}$ of ${\text{H}}_{\text{2}}\text{O}$ will be formed.

(e)

Interpretation Introduction

Interpretation:

The given statement is correct or incorrect has to be given.

The given statement is,

When $\text{10}{\text{mol CH}}_{\text{4}}$, $\text{10}\text{mol}{\text{O}}_{\text{2}}$ and $\text{10}{\text{mol NH}}_3$ are mixed and reacted, ${\text{O}}_{\text{2}}$ is the limiting reactant.

Concept Introduction:

The limiting reactant of the reaction is the reactant that is completely used during the reaction.  Using the mole ratio and starting amounts of the reactants limiting reactant can be determined.

Example:

Consider a reaction starts with $\text{30}{\text{g CaCO}}_{\text{3}}\text{\&}\text{11}\text{g}\text{HCl}\text{.}$  The values in grams has to be converted to moles by dividing with their molecular weights.  According to the mole ratio $\text{0}\text{.3}\text{g}$ of calcium carbonate require $\text{0}\text{.6}\text{g}$ of $\text{HCl}$ completely.  Therefore HCl is the limiting agent.

(f)

Interpretation Introduction

Interpretation:

The given statement is correct or incorrect has to be given.

The given statement is,

When three moles each of methane, oxygen and ammonia are mixed and reacted, three moles of hydrogen cyanide will be produced.