Chapter 3, Problem 30AE

(a)

Interpretation Introduction

Interpretation:

The number of atoms that make up one molecule of vitamin ${\text{B}}_{\text{12}}$ has to be given.

(b)

Interpretation Introduction

Interpretation:

The percentage of carbon in total atoms of vitamin ${\text{B}}_{\text{12}}$ has to be calculated.

(c)

Interpretation Introduction

Interpretation:

The fraction of metal in total atoms of vitamin ${\text{B}}_{\text{12}}$ has to be calculated.