Chapter 11, Problem 60QP

Interpretation Introduction

Interpretation:

The amount of polychlorinated biphenyls (PCBs) present in grams in a $65.0\text{kg}$ male having PCBs level $190\text{ppb}$ is to be calculated.

Concept Introduction:

Polychlorinated biphenyls (PCBs) are a group of synthesized chemicals. They can be oily or solid having clear to yellow colour with no taste or smell. They form very stable mixtures at extreme temperature and pressure. Every human body is contaminated by $\text{PCBs}$ . They are consumed by eating contaminated fish, meat or dairy products.

Since they are present in very small traces in the human body, their amount is expressed by parts per billion units (ppb). The parts per billion is the ratio of the mass of solute and mass of solution times ${\text{10}}^{\text{9}}.$