Question

You have a 300 g sample of water that contains 6.00x10⁻⁵ g of arsenic. What is the concentration of arsenic in the water sample in parts per million?

A) 2.00 ppm
B) 20.00 ppm
C) 200.00 ppm
D) 2000.00 ppm

Answer 1

The concentration of arsenic in the water sample is 2.00 ppm.

Step-by-step explanation:

The concentration of arsenic in the water sample can be calculated using the formula for parts per million (ppm). In this case, the concentration of arsenic is given as 6.00x10⁻⁵ g in a 300 g sample of water. To calculate the concentration in ppm, we divide the mass of arsenic by the mass of the water sample and multiply by 1,000,000.

Concentration of arsenic (ppm) = (mass of arsenic / mass of water sample) x 1,000,000

Concentration of arsenic (ppm) = (6.00x10⁻⁵ g / 300 g) x 1,000,000

Concentration of arsenic (ppm) = 2.00 ppm