Chapter 2, Problem 2.105P

(a)

Interpretation Introduction

Interpretation:Mass $\%$ of platinum is to be determined.

Concept introduction:A compound is a substance made of two or more chemical elements that are chemically bonded together. So, mass percent of each element in a compound depends on amount of the compound.

Formula to calculate mass percent is as follows:

  $\text{Mass}\text{of}\text{element}=\left(\frac{\text{mass}\text{of}\text{element}}{\text{total}\text{mass}\text{of}\text{compound}}\right)\left(100\right)\%$

(b)

Interpretation Introduction

Interpretation: Total mass of Platinol that can be made for $\$1.00\text{ million}$ is to be determined.

Concept introduction: Law of mass conservation is defined as for an isolated system the mass can neither be created nor destroyed by chemical reaction. Hence, mass of reactant before reaction and mass of the product will remain the same.

Chemical compounds contain its constituent elements in a fixed ratio by mass and it is independent of its origin and the way of preparation, it is known as law of definite proportions.