Chapter 2, Problem 2.42QP

(a)

Interpretation Introduction

Interpretation:

The empirical formula for ${\text{Al}}_{\text{2}}{\text{Br}}_{\text{6}}$ should be written.

Concept Introduction:

The empirical formula reveals that which elements are present in a molecule and simplest whole number ratio of their atoms.

(b)

Interpretation Introduction

Interpretation:

The empirical formula for ${\text{Na}}_{\text{2}}{\text{S}}_{\text{2}}{\text{O}}_{\text{4}}$ should be written.

Concept Introduction:

The empirical formula reveals that which elements are present in a molecule and simplest whole number ratio of their atoms.

(c)

Interpretation Introduction

Interpretation:

The empirical formula for ${\text{N}}_{\text{2}}{\text{O}}_{\text{5}}$ should be written.

Concept Introduction:

The empirical formula reveals that which elements are present in a molecule and simplest whole number ratio of their atoms.

(d)

Interpretation Introduction

Interpretation:

The empirical formula for ${\text{K}}_{\text{2}}{\text{Cr}}_{\text{2}}{\text{O}}_{\text{7}}$ should be written.

Concept Introduction:

The empirical formula reveals that which elements are present in a molecule and simplest whole number ratio of their atoms.