Chapter 4, Problem 23E

Interpretation Introduction

Interpretation:

The mass percent of ${\text{Fe}}_{\text{2}}{\text{O}}_{\text{3}}$ in an impure ore is to be calculated.

Concept introduction:

The study in which the amount of materials i.e. reactant or products consumed or produced is studied is known as stoichiometry.

Number of moles is defined as the ratio of mass to the molar mass. The mathematical expression is given by:

Number of moles = $\frac{\text{ mass}}{\text{Molar mass}}$

Percentage of ${\text{Fe}}_{\text{2}}{\text{O}}_{\text{3}}$ in impure ore = $\frac{{\text{mass of Fe}}_{\text{2}}{\text{O}}_{\text{3}}}{\text{mass of ore}}\times 100$