4:32 minutes
Problem 72a
Textbook Question

Hydrogen gas can be prepared by reaction of zinc metal with aqueous HCl: Zn1s2 + 2 HCl1aq2¡ZnCl21aq2 + H21g2 (a) How many liters of H2 would be formed at 742 mm Hg and 15 °C if 25.5 g of zinc was allowed to react?

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