2L of a solution with a density of 1.11 g / cm3 contains 150 g of a solute. Calculate the mass fraction

2L of a solution with a density of 1.11 g / cm3 contains 150 g of a solute. Calculate the mass fraction of the substance in the solution.

Given:
V solution (in-va) = 2 l = 2000 ml
ρ solution (in-va) = 1.11 g / cm3 = 1.11 g / ml
m (in-va) = 150 g

To find:
ω (in-va) -?

Solution:
1) m solution (in-va) = ρ solution (in-va) * V solution (in-va) = 1.11 * 2000 = 2220 g;
2) ω (in-va) = m (in-va) * 100% / m solution (in-va) = 150 * 100% / 2220 = 6.76%.

Answer: The mass fraction of the substance is 6.76%.