A 4-L sample of water contains 80 µg of lead.What is this lead concentration,in parts per billion (ppb)?

Question

Quizplus · Accepted Answer

The concentration of lead in the water sample is calculated as micrograms of lead per liter of water. Since there are 4 liters of water containing 80 µg of lead, the concentration is $ \frac{80 \mu g}{4 L} = 20 \mu g/L $. Since 1 ppb is equivalent to 1 µg/L, the concentration is 20 ppb.

A 4-L Sample of Water Contains 80 µG of Lead