Question

calculate the mass percent of a solution containing 170.0 grams of NaOH in 300.0 ml of water

Answer 1

Assuming the density of water equal 1 g/mL, the mass of water is 300.0 g.

$mass\%=\frac{170.0g}{170.0g+300.0g}\times100\%=36.17\%$

Answer: 36.17%