Under certain circumstances, carbon dioxide, CO2(g), can be made to react with h
ID: 951719 • Letter: U
Question
Under certain circumstances, carbon dioxide, CO2(g), can be made to react with hydrogen gas, H2(g), to produce methane, CH4(g), and water vapor, H2O(g): CO2(g)+4H2(g)CH4(g)+2H2O(g)
Part A How many moles of methane are produced when 36.6 moles of carbon dioxide gas react with excess hydrogen gas? Express your answer with the appropriate units.
Part B How many moles of hydrogen gas would be needed to react with excess carbon dioxide to produce 53.6 moles of water vapor? Express your answer with the appropriate units.
Explanation / Answer
a) CO2(g) + 4H2(g) CH4(g) + 2H2O(g)
1 mol 1 mol
36.6 mol ? = 36.6 mol
Therefore,
36.6 moles of methane are produced when 36.6 moles of carbon dioxide gas react with excess hydrogen gas.
b) CO2(g) + 4H2(g) CH4(g) + 2H2O(g)
4 mol 2 mol
? 53.6 mol
? = 4 mol H2 x (53.6 mol water/ 2 mol water)
= 107.2 mol H2
Therefore,
107.2 moles of hydrogen gas would be needed to react with excess carbon dioxide to produce 53.6 moles of water vapor.
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