Considering the reaction stoichiometry, the total number of moles of CO₂ produced by the complete combustion of 5.0 moles of C₂H₆ is 10 moles.
The balanced reaction is:
2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
- C₂H₆: 2 moles
- O₂: 7 moles
- CO₂: 4 moles
- H₂O: 6 moles
Then you can apply the following rule of three: if by stoichiometry 2 moles of C₂H₆ produce 4 moles of CO₂, 5 moles of C₂H₆ will produce how many moles of CO₂?
[tex]amount of moles of CO_{2} =\frac{5 moles of C_{2} H_{6} x4moles of CO_{2}}{2 moles of C_{2} H_{6} }[/tex]
amount of moles of CO₂= 10 moles
Finally, the total number of moles of CO₂ produced by the complete combustion of 5.0 moles of C₂H₆ is 10 moles.
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