Chapter 3, Problem 36QP

Interpretation Introduction

Interpretation:

The number of moles of calcium atoms in $77.4\text{ g}$ of $\text{Ca}$ is to be determined.

Concept Introduction:

A mole is a quantity used to express a very large number of atoms or molecules. One mole of a substance is equal to $6.022\times {10}^{23}$, i.e., Avogadro’s number.

The molar mass of the substance is the mass of that substance present in its one mole.

The moles of a substance are expressed as:

$n=\frac{m}{\text{M}}$

Here, $m$ is the mass of the substance, M is the molar mass, and $n$ is the number of moles.