300 g of a solution with a mass fraction of salt of 20% and 500 g of a solution with a mass fraction of 40% were mixed

300 g of a solution with a mass fraction of salt of 20% and 500 g of a solution with a mass fraction of 40% were mixed. Mass fraction of salt in the resulting solution is equal to

Determine the masses of substances in each solution
by the formula m of the substance = ω * m of the solution
m substances 1 = 300 * 0.2 = 60g
m substances 2 = 500 * 0.4 = 200g
m substances 3 = 260g
Determine the proportion of the resulting solution
ω = m substance 3 / (m solution 3)
ω = 260 / (300 + 500) = 0.325 (32.5%)

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