What mass of salt is formed by the interaction of 80 g of a solution with a mass fraction of sulfuric acid 24% and iron hydroxide 2.

given:
m solution (H2SO4) = 80 g
w (H2SO4) = 24%
to find:
m (FeSO4)
decision:
H2SO4 + Fe (OH) 2 = FeSO4 + 2H2O
m substance (H2SO4) = m solution * w = 80 g * 0.24 = 19.2 g
n (H2SO4) = m: M = 19.2 g: 98 g / mol = 0.2 mol
n (H2SO4): n (FeSO4) = 1: 1 = 0.2 mol
m (FeSO4) = n * M = 0.2 mol * 152 g / mol = 30.4 g
answer: 30.4 g