Answer to Question #182661 in General Chemistry for Madison

General Chemistry

Question #182661

What mass of magnesium will react with excess hydrochloric acid to produce 500. mL of hydrogen gas at STP?

Expert's answer

1 mole H2 = 1 mole of Mg

22.4L H2 = 24 g Mg

0.5L H2 = 24 × 0.5/22.4 = 0.536g

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