A 3.00 g piece of impure Zn reacts with excess HCl and produces 0.0380 mol of H₂ gas

CHEMISTRY · Subjective · A Level · Chemistry · Amount of substance · Amount of substance

Problem

A 3.00 g piece of impure Zn reacts with excess HCl and produces 0.0380 mol of H₂ gas. (a) Determine the percent purity of Zn in the sample. (b) Calculate the mass of pure Zn that was present (to three significant figures).

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