1. In the formation of carbon dioxide from carbon monoxide and oxygen, how many moles of carbon monoxide are needed to react completely with 7.0 moles of oxygen gas?
2 CO (g ) + O2 (g ) → 2 CO2 (g )
2. How many moles of carbon dioxide, CO
2 , can be formed by the decomposition of 5 moles of aluminum carbonate, Al
2 (CO
3 )
2 ?
Al2 (CO3 )3 → Al2 O3 + 3 CO2
3. In the formation of carbon dioxide from carbon monoxide and oxygen, how many liters of carbon monoxide, CO, are needed to react completely with 1/2 mole of oxygen gas at STP?
2 CO (g ) + O2 (g ) → 2 CO2 (g )
4. How many moles of oxygen are required to burn 22.4 liters of ethane gas, C
2 H
6 at standard conditions?
2 C2 H6 (g ) + 7 O2 (g ) → 4 CO2 (g ) + 6 H2 O (g )
5. How many grams of oxygen are produced by the decomposition of 1 mole of potassium chlorate, KClO
3 ?
2 KClO3 → 2 KCl + 3 O2
6. A chemist performs the synthesis of sodium chloride from its elements. The chemist begins with 46 grams of sodium. How many moles of chlorine are needed?
2 Na + Cl2 → 2 NaCl
7. How many grams of water can be prepared from 5 moles of hydrogen at standard conditions?
2 H2 (g ) + O2 (g ) → 2 H2 O
8. Suppose that an excess of propane, C
3 H
8 burns in 320 g of O
2 . How many moles of H
2 O will be formed?
C3 H8 + 5 O2 → 3 CO2 + 4 H2 O
9. At standard conditions, how many liters of carbon dioxide, CO
2 , will be formed by the combustion of 1/2 mole of propane, C
3 H
8 ?
C3 H8 + 5 O2 → 3 CO2 + 4 H2 O
10. Ammonia, NH
3 , is commercially prepared by the Haber process. How many moles of ammonia can be formed from 44.8 liters of nitrogen gas and an excess of hydrogen at standard conditions?
3 H2 (g ) + N2 (g ) → 2 NH3 (g )
11. How many liters of hydrogen, H
2 , are needed to react with 10 liters of nitrogen gas in the reaction forming ammonia?
3 H2 (g ) + N2 (g ) → 2 NH3 (g )
12. How many grams of water can be prepared from 8 grams of hydrogen at standard conditions?
2 H2 (g ) + O2 (g ) → 2 H2 O
13. How many grams of carbon dioxide are produced by the combustion of 22.4 liters of ethane gas, C
2 H
6 at standard conditions?
2 C2 H6 (g ) + 7 O2 (g ) → 4 CO2 (g ) + 6 H2 O (g )
14. How many liters of oxygen, at standard conditions, are required to react with 30 grams of glucose, C
6 H
12 O
6 ?
C6 H12 O6 (s ) + 6 O2 (g ) → 6 CO2 (g ) + 6 H2 O (g )
15. How many grams of calcium must react with of sulfuric acid, H
2 SO
4 , in order to produce 5.6 liters of hydrogen gas?
Ca + H2 SO4 → CaSO4 + H2
16. How many grams of calcium will react with 44.8 liters of oxygen gas at standard conditions?
2 Ca + O2 → 2 CaO
17. A certain amount of glucose, C
6 H
12 O
6 burned in oxygen, and produced 22 grams of carbon dioxide, CO
2 . How many grams of water was produced at the same time?
C6 H12 O6 (s ) + 6 O2 (g ) → 6 CO2 (g ) + 6 H2 O (g )
18. How many liters of oxygen are required to react completely with 22.4 liters of carbon monoxide, CO, at standard conditions?
2 CO (g ) + O2 (g ) → 2 CO2 (g )