Answer:
3.5 moles CO
Explanation:
To convert between moles of CO and moles of C₂H₆, you need to use the mole-to-mole ratio. These values are the coefficients in the reaction. Because you are starting with C₂H₆, the coefficient of C₂H₆ should be on the bottom of the ratio to allow for the cancellation of units.
2 C₂H₆ + 5 O₂ ----> 2 CO + 6 H₂O
3.5 moles C₂H₆ 2 moles CO
----------------------- x ------------------------ = 3.5 moles CO
2 moles C₂H₆
