2/29 HW ANSWERS – Gas Stoichiometry

1. How many mL of hydrogen at STP are produced from 28.0 grams of zinc reacting with an excess of sulfuric acid (H₂SO₄)?

9,590 mL

2. How many grams of NaCl can be produced by the reaction of 112 mL of chlorine at STP with excess sodium?

0.584 g NaCl

3. Bromine reacts with 5,600 mL of hydrogen to yield what mass of hydrogen bromide at STP?

40. g HBr

4. How many grams of solid antimony (III) chloride can be produced from 3750 mL of chlorine gas at STP reacting with an excess of antimony (Sb)?

25.5 g SbCl₃

5. How many L of oxygen are required to burn 1.00 L of methane (CH₄)? This reaction takes place at STP.

2.00 L O₂