Chapter 7, Problem 7.90CQ

Interpretation Introduction

(a)

Interpretation :

The mass of the gold bar should be calculated.

Concept Introduction :

Density is a physical property which exhibits the relation between mass and volume.

  $\text{Density = }\frac{\text{Mass}}{\text{volume}}$

The equality between number of atoms and moles can be written as;

  $\text{1 mole = 6}{\text{.022 x 10}}^{\text{23}}\text{atoms}$

Interpretation Introduction

(b)

Interpretation :

The number of atoms of gold in the bar should be calculated.

Concept Introduction :

Density is a physical property which exhibits the relation between mass and volume.

  $\text{Density = }\frac{\text{Mass}}{\text{volume}}$

The equality between number of atoms and moles can be written as;

  $\text{1 mole = 6}{\text{.022 x 10}}^{\text{23}}\text{atoms}$

Interpretation Introduction

(c)

Interpretation :

The number of moles of oxygen combined with gold should be calculated.

Concept Introduction :

Density is a physical property which exhibits the relation between mass and volume.

  $\text{Density = }\frac{\text{Mass}}{\text{volume}}$

The equality between number of atoms and moles can be written as;

  $\text{1 mole = 6}{\text{.022 x 10}}^{\text{23}}\text{atoms}$

Interpretation Introduction

(d)

Interpretation :

The molecular formula of the compound should be calculated.

Concept Introduction :

Density is a physical property which exhibits the relation between mass and volume.

  $\text{Density = }\frac{\text{Mass}}{\text{volume}}$

The equality between number of atoms and moles can be written as;

  $\text{1 mole = 6}{\text{.022 x 10}}^{\text{23}}\text{atoms}$