How many moles of methane are produced when 85.1 molesmoles of carbon dioxide gas react with excess hydrogen gas?

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter16: Thermodynamics: Directionality Of Chemical Reactions
Section: Chapter Questions
Problem 120QRT
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Under certain circumstances, carbon dioxide, CO2(g)CO2(g), can be made to react with hydrogen gas, H2(g)H2(g), to produce methane, CH4(g)CH4(g), and water vapor, H2O(g)H2O(g):

CO2(g)+4H2(g)→CH4(g)+2H2O(g)

A.How many moles of methane are produced when 85.1 molesmoles of carbon dioxide gas react with excess hydrogen gas?

Express your answer with the appropriate units.
 
B.
How many moles of hydrogen gas would be needed to react with excess carbon dioxide to produce 76.6 molesmoles of water vapor?
 
Express your answer with the appropriate units.
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