Chapter 10.2, Problem 25SSC

Interpretation Introduction

Interpretation:

The procedure by which the mass of an element will be converted to the number of atom needs to be explained.

Concept introduction:

One mole of any substance contains Avogadro’s number of atoms i.e. $6\cdot 023\times {10}^{23}$ atoms. The mass of all these atoms in a mole is called molar mass measured in grams.

Answer to Problem 25SSC

1. Convert the mass into moles by dividing the mass by the molar mass.

2. The moles then are converted to number of atoms by multiplying the Avogadro’s number.

Explanation of Solution

One mole contains $6\cdot 023\times {10}^{23}$ atoms, one first needs to find the number of moles from the given mass. Using mass-mole conversion, divide mass by molar mass to get number of moles in the given mass. After getting the number of moles, multiply it by the Avogadro’s number to get the total number of atoms in the given mass.