Environmental Chemistry

100 ppb (parts per billion) is equal to 0.1 ppm (parts per million), since:

1%20%5C%2C%20%5Ctext%7Bppm%7D%20%3D%201000%20%5C%2C%20%5Ctext%7Bppb%7D%20%5Cquad%20%5CRightarrow%20%5Cquad%20100%20%5C%2C%20%5Ctext%7Bppb%7D%20%3D%20%5Cfrac%7B100%7D%7B1000%7D%20%3D%200.1%20%5C%2C%20%5Ctext%7Bppm%7D

Hence, 100 ppb = 0.1 ppm.

Chapter Questions
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