Stoich_class WS

# Stoich_class WS - Chemistry Stoichiometry Unit Name...

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Chemistry Stoichiometry Unit Name: ___________________________ Stoichiometry Class Problems Date: __________________ Period: ___ Directions: Complete the stoichiometry problems below, showing the dimensional analysis work and circling your final answer(s). 1. Calculate the number of moles of water produced from the reaction of 4.2 mol of Al in the following reaction: 6 NH 4 ClO 4 + 10 Al → 5 Al 2 O 3 + 3 N 2 + 6 HCl + 9 H 2 O 2. Calculate the number of moles of nitrogen gas needed to produce 7.2 mol of NH 3 in the following reaction: 1 N 2 + 3 H 2 2 NH 3 3. How many moles of water can be formed when propane gas (C 3 H 8 ) reacts with 2.0 moles of oxygen gas according to the reaction below? ___ C 3 H 8 + ___ O 2 → ___ CO 2 + ___ H 2 O Remember…you need a balanced equation first!! 4. If 20.0 grams of zinc reacts with hydrochloric acid, according to the following reaction, how many moles of zinc chloride are produced? ___ Zn + ___ HCl → ___ ZnCl 2 + ___ H 2 Game plan: grams Zn → moles Zn → moles ZnCl 2

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5. To produce 10.0 grams of NaCl, how many grams of chlorine gas must be reacted?
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