Chapter 12A.1, Problem 3P

Interpretation Introduction

(a)

Interpretation: Two molecular formulas for the given molecules are to be proposed.

Concept introduction: Molecular mass is the sum of the atomic weights of each constituent element multiplied by the number of atoms of that element. The compound that contain $\text{C, H}$ and $\text{O}$ atoms always have a molecular ion with even mass.

Interpretation Introduction

(b)

Interpretation: Two molecular formulas for the given molecules are to be proposed.

Concept introduction: Molecular mass is the sum of the atomic weights of each constituent element multiplied by the number of atoms of that element. The compound that contain $\text{C, H}$ and $\text{O}$ atoms always have a molecular ion with even mass.

Interpretation Introduction

(c)

Interpretation: Two molecular formulas for the given molecules are to be proposed.

Concept introduction: The molecular ion has odd mass, the compound may contain $\text{C, H}$ and $\text{N}$ atoms. The compound that contains an odd number of $\text{N}$ atoms gives an odd molecular ion.