A 650.0 g hard-water sample contains 101 mg Ca. what is this concentration in parts per million

= 155 ppm

Explanation:

PPM also refers to parts per million, it represents a low concentration of a solution. It represents 0.001 gram or a milligram in a 1000 mL, equivalent to 1 mg per liter

Given that;

101 mg of Ca in 650.0 g of water

1 ppm = 1 mg/L

650 g = 650 mL = 0.65 L

Therefore;

= 101 mg / 0.65 L

= 155.38 mg/L

= 155 ppm