Chapter 22, Problem 22.79P

(a)

Interpretation Introduction

Interpretation:

The mass of copper ore needed to construct another statue of liberty has to be calculated.

Concept Introduction:

Mass percent: It is the ratio of mass of an element in the compound to that of total mass of the compound and multiplied by hundred.

    $\text{Mass}\text{percent}\text{=}\frac{\text{Mass}\text{of}\text{an}\text{element}\text{(g)}}{\text{Total}\text{mass}\text{of}\text{the}\text{compound}\text{(g)}}\text{×}\text{100\%}$

(b)

Interpretation Introduction

Interpretation:

The mass percent of chalcopyrite in the ore has to be calculated.

Concept Introduction:

Mass percent: It is the ratio of mass of an element in the compound to that of total mass of the compound and multiplied by hundred.

    $\text{Mass}\text{percent}\text{=}\frac{\text{Mass}\text{of}\text{an}\text{element}\text{(g)}}{\text{Total}\text{mass}\text{of}\text{the}\text{compound}\text{(g)}}\text{×}\text{100\%}$