Chapter 4, Problem 4.25QP

Interpretation Introduction

Interpretation: The average concentration of ${\text{NF}}_{\text{3}}$ is increased in atmosphere from $1978-2008$. The concentration of ${\text{NF}}_{\text{3}}$ in mg per kg of air in $2008$ is to be calculated.

Concept introduction: The concentration of a substance in a mixture is expressed by mass percentage. It is a ratio of the mass of a substance divided by the total mass of a mixture.

To determine: The concentration of ${\text{NF}}_{\text{3}}$ in mg per kg of air in $2008$.