Find the mass of zinc that has reacted with hydrochloric acid if 4 grams of hydrogen is produced.

univerkov | January 17, 2021 | education

Given:
m (H2) = 4 g
To find:
m (Zn)
Decision:
Zn + 2HCl = ZnCl2 + H2
n (H2) = m / M = 4 g / 2 g / mol = 2 mol
n (H2): n (Zn) = 1: 1
n (Zn) = 2 mol
m (Zn) = n * M = 2 mol * 65 g / mol = 130 g
Answer: 130 g

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