6:01 minutes
Problem 72b
Textbook Question

Hydrogen gas can be prepared by reaction of zinc metal with aqueous HCl: Zn1s2 + 2 HCl1aq2¡ZnCl21aq2 + H21g2 (b) How many grams of zinc would you start with if you wanted to prepare 5.00 L of H2 at 350 mm Hg and 30.0 °C?

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