Stoichiometry Review

Use a periodic table, but NO calculator! Round molar masses to the "ones" place.

Fill in all the answer, written as a number, then press "Check" (bottom of the page) to check your answers. If you express your answer as a fraction, be sure to reduce it to simplest terms.
1. In the formation of carbon dioxide from carbon monoxide and oxygen, how many grams of carbon monoxide are needed to react completely with 16 grams of oxygen gas?
2 CO (g) + O2(g) → 2 CO2 (g)

grams


2. How many grams of carbon dioxide, CO2, can be formed by the decomposition of 117 grams of aluminum carbonate, Al2(CO3)3?
Al2(CO3)3 → Al2O3 + 3 CO2

grams


3. In the formation of carbon dioxide from carbon monoxide and oxygen, how many grams of carbon dioxide are produced by the reaction of 8 grams of oxygen with an excess of carbon monoxide?
2 CO (g) + O2(g) → 2 CO2 (g)

grams


4. How many grams of oxygen are required to burn 60 grams of ethane gas, C2H6?
2 C2H6 (g) + 7 O2(g) → 4 CO2 (g) + 6 H2O (g)

grams


5. How many grams of carbon dioxide are produced by the decomposition of 53 grams of sodium carbonate, Na2CO3?
Na2CO3 → Na2O + CO2

grams


6. A chemist performs the synthesis of sodium fluoride from its elements. The chemist begins with 46 grams of sodium. How many grams of fluorine are needed?
2 Na + F2 → 2 NaF

grams


7. How many grams of water can be prepared from 10 grams of hydrogen and an excess of oxygen?
2 H2 (g) + O2(g) → 2 H2O

grams


8. Suppose that an excess of propane, C3H8 burns in 320 g of O2. How many grams of H2O will be formed?
C3H8 + 5 O2 → 3 CO2 + 4 H2O

grams


9. How many grams of carbon dioxide, CO2, will be formed by the combustion of 11 grams of propane, C3H8?
C3H8 + 5 O2 → 3 CO2 + 4 H2O

grams


10. Ammonia, NH3, is commercially prepared by the Haber process. How many grams of ammonia can be formed from 12 grams of hydrogen gas and an excess of nitrogen?
3 H2 (g) + N2(g) → 2 NH3 (g)

grams


11. How many grams of hydrogen, H2, are needed to react with 84 grams of nitrogen gas in the reaction forming ammonia?
3 H2 (g) + N2(g) → 2 NH3 (g)

grams


12. How many grams of water can be prepared from 8 grams of hydrogen and an excess of oxygen?
2 H2 (g) + O2(g) → 2 H2O

grams


13. How many grams of carbon dioxide are produced by the combustion of 30 grams of ethane gas, C2H6?
2 C2H6 (g) + 7 O2(g) → 4 CO2 (g) + 6 H2O (g)

grams


14. How many grams of oxygen are required to react with 30 grams of glucose, C6H12O6?

C6H12O6 (s) + 6 O2(g) → 6 CO2 (g) + 6 H2O (g)

grams


15. How many grams of calcium must react with of sulfuric acid, H2SO4, in order to produce 4 grams of hydrogen gas?
Ca + H2SO4 → CaSO4 + H2

grams


16. How many grams of calcium will react with 64 grams of oxygen gas in the reaction shown below?
2 Ca + O2 → 2 CaO

grams


17. A certain amount of glucose, C6H12O6 burned in oxygen, and produced 22 grams of carbon dioxide, CO2. How many grams of water was produced at the same time?
C6H12O6 (s) + 6 O2(g) → 6 CO2 (g) + 6 H2O (g)

grams


18. How many grams of oxygen are required to react completely with 56 grams of carbon monoxide, CO?
2 CO (g) + O2(g) → 2 CO2 (g)

grams