Chapter 3.4, Problem 3.8.2PE

Interpretation Introduction

Interpretation:

The number of atoms of oxygen in the given samples is to be determined.

Concept introduction:

The number of atoms of oxygen in the given sample is calculated by using the formula,

$\left(\begin{array}{l}\text{Number}\text{of}\text{atoms}\\ \text{of}\text{oxygen}\end{array}\right)=\left(\begin{array}{l}\text{Number}\text{of}\text{atoms}\\ \text{of}\text{O}\text{in}\text{one}\text{molecule}\end{array}\right)\left(\begin{array}{l}\text{Number}\text{}\text{of}\\ \text{moles}\text{of}\text{O}\end{array}\right)\left(6.023\times {10}^{23}\right)$

(a)

To determine:

The number of oxygen atoms in the sample containing $0.25\text{mol}$ calcium nitrate.

Interpretation Introduction

(b)

To determine:

The number of oxygen atom in the sample containing $1.50\text{mol}$ sodium carbonate.