What is the mass percent concentration of a solution containing 29.0 g NaCl and 115.0 mL of water? Assume a density of 1.00 g/mL for water.

Mass percent concentration: 25,2% m/m

Explanation:

The percentage mass by mass indicates the grams of solute in 100 grams of solution. We convert the ml of water into g from the density formula:

δ= m/v    m=δx v= 1 g/ml x 115 ml= 115 g

115g solution29 g NaCl

100g solutionx=(100g solutionx29 g NaCl)/115g solution

x=25,2173913 g NaCl

the answer is either b or c

it is the most commonly accepted one