Chapter 2, Problem 2.74QE

(a)

Interpretation Introduction

Interpretation:

Molecular mass of ${\text{P}}_{\text{4}}{\text{O}}_{\text{10}}$ has to be calculated.

Concept Introduction:

Each and every element has its own atomic mass.  In a molecule, the sum of atomic mass of all atoms that is present is known as the molecular mass.  The units used for expressing molecular mass is atomic mass units ($\text{u}$).

(b)

Interpretation Introduction

Interpretation:

Molecular mass of ${\text{C}}_{\text{6}}{\text{H}}_{\text{7}}\text{N}$ has to be calculated.

Concept Introduction:

Refer part (a).

(c)

Interpretation Introduction

Interpretation:

Molecular mass of ${\text{H}}_{\text{3}}{\text{PO}}_{\text{4}}$ has to be calculated.

Concept Introduction:

Refer part (a).