Chapter 5, Problem 25Q

Interpretation Introduction

Interpretation: The noble gas having smallest density at STP should be identified.

Concept introduction:

• Equation for density is,

       $\text{Density}\text{=}\frac{\text{Mass}}{\text{Volume}}$

• According to ideal gas equation,

  $\text{Pressure}\text{×}\text{Volume}\text{=}\frac{\text{Mass}\text{×}\text{R}\text{×}\text{Temperature}}{\text{Molecular}\text{mass}}$

• Ideal gas equation in terms of Density,

                $\text{Density}\text{=}\frac{\text{Pressure}\text{×}\text{Molecular mass}}{\text{R}\text{×}\text{Temperature}}$

• STP: standard temperature and pressure, it is the condition of ${\text{0}}^{\text{o}}C$ and 1 atm.