Molarity and Parts Per Million

6 mg of mercury was found in a 5 L sample of water. What is the concentration of mercury in ppm?

• 120 ppm

• 1.2 ppm

• 120000 ppm

• 1200 ppm

What is the concentration in ppm when 30 mg of NaCl are dissolved in 600 mL of water?

• 0.05 ppm

• 18 ppm

• 50 ppm

• 1800 ppm

How many grams of Ca(OH)₂ are in a solution with a concentration of 250 parts per million and a volume of 8000 ml ?

• 0.032 g

• 2 g

• 32 g

• 2000 g

You have 0.00015 grams of sugar dissolved in 500 mL of water. What is the solution's concentration in ppm?

• 0.3 ppm

• 300 ppm

• 0.0003 ppm

• 3 ppm

A solution has concentration 444 parts per million and contains 2.22 g of KNO₃ . What is the volume of the solution?

• 2 L

• 5 L

• 200 L

• 986 L

Determine the concentration in parts per million of a solution containing 1.5 g of Ca(OH)₂ dissolved in 8000 mL of water.

• 200 ppm

• 187 ppm

• 250 ppm

• 207 ppm

Tags

NGSS.MS-PS1-2

How many grams of KCl are dissolved in 2000 mL of water if the concentration of the solution is 250 ppm?

• 25 g

• 10 g

• 0.5 g

• 2.5 g

What is the concentration in parts per million of a solution containing 2.0 g of KNO₃ in 4500 mL of water?

• 415 ppm

• 530 ppm

• 444 ppm

• 473 ppm

0.006 grams of mercury was found in a 5 L sample of water. What is the concentration of mercury in ppm?

• 120 ppm

• 1.2 ppm

• 120000 ppm

• 1200 ppm

What is the volume of water if the concentration 50 ppm in a solution containing 30 mg of NaCl ? (be careful of the units!!)

• 0.6 mL

• 6 mL

• 60 mL

• 600 mL