Find the mass of salt obtained by reacting zinc oxide with 365 grams of 10% hydrochloric acid solution. A (Cl) = 35.5

Reaction: ZnO + 2HCl = ZnCl2 + H2O
It is necessary to find the mass of the substance of hydrochloric acid in the solution according to the formula: mv-va = w * mr-ra (w is the mass fraction, expressed in units, not in percent). mv-va (HCl) = 365 g * 0.1 = 36.5 g. Let us find the amount of hydrochloric acid substance: n = m / M (M = 35.5 + 1 = 36.5 g / mol – molar mass). n (HCl) = 36.5 g / 36.5 g / mol = 1 mol. According to the reaction from 2 mol of acid, 1 mol of salt is obtained, 1/2 = n (salt) / 1. n (salt) = 0.5 mol. Its mass is m = 0.5 mol * 136 g / mol = 68 g.