Chapter 14.3, Problem 30LC

Interpretation Introduction

Interpretation: To determine the number of moles of a contained gas when pressure, volume, and temperature are known.

Concept Introduction: The International System of Units uses the mole (symbol, mol) as the unit of material quantity. However many elementary entities of a particular substance present in an object or sample are determined by the quantity of that material.

Answer to Problem 30LC

The number of moles can be determined by using the ideal gas equation which is $\text{PV}\text{=}\text{n}\text{RT}$ , here, n is the number of moles.

Explanation of Solution

The number of moles can be determined by using the ideal gas equation:

  $\text{PV}\text{=}\text{n}\text{RT}$ ……….(i)

Here, P is pressure, V is volume, R is gas constant and T is temperature.

By rearranging equation (i).

  $\text{n}\text{=}\frac{\text{PV}}{\text{RT}}$ ….(ii)

By using equation (ii), the number of moles of gas can be determined.