Chapter 3, Problem 3.86QP

(a)

Interpretation Introduction

To determine: The empirical and the molecular formulas of the compound that is produced by the reaction of ferrophosphorus $\left({\text{Fe}}_{\text{2}}\text{P}\right)$ and pyrite $\left({\text{FeS}}_{\text{2}}\right)$.

Interpretation: The empirical and the molecular formulas of the compound that is produced by the reaction of ferrophosphorus $\left({\text{Fe}}_{\text{2}}\text{P}\right)$ and pyrite $\left({\text{FeS}}_{\text{2}}\right)$ are to be predicted.

Concept introduction: The actual number and type of atoms present in a single molecule of a compound is termed as molecular formula.

The formula of a compound that represents a smallest whole number ratio of the atoms present in a molecule of a compound is termed as empirical formula.

(b)

Interpretation Introduction

To determine: The balanced chemical equation for the reaction of ferrophosphorus $\left({\text{Fe}}_{\text{2}}\text{P}\right)$ with pyrite $\left({\text{FeS}}_{\text{2}}\right)$.

Interpretation: The balanced chemical equation for the reaction of ferrophosphorus $\left({\text{Fe}}_{\text{2}}\text{P}\right)$ with pyrite $\left({\text{FeS}}_{\text{2}}\right)$ is to be stated.

Concept introduction: The chemical equation that has equal number of atoms and equal amount charge on both the sides of the equation is termed as balanced equation.