A sample of drinking water contains 668 ppm of lead. How many grams of lead are there in 100.0 g of this water?

0.0668g

Explanation:

Step 1: Given data

Concentration of lead: 668 ppm (mg/kg)

Mass of water: 100.0 g

Step 2: Convert the mass of water to kilograms

We will use the relationship 1 kg = 1,000 g.

Step 3: Calculate the mass of lead in 0.1000 kg of water

There are 668 mg of Pb in 1 kg of water.

Step 4: Convert the mass of Pb to grams

We will use the relationship 1 g = 1,000 mg.

c, liquids evaporate, creating a gas