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6 February, 17:22

Consider the combustion of ethane gas, C2H6. In the balanced chemical equation, what are the lowest, whole number coefficients? Match the number to the species.

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  1. 6 February, 17:32
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    2C2H6 + 7O2 - > 4CO2 + 6H20

    The coefficients are 2, 7, 4, 6

    Explanation:

    Ethane undergoes Combustion to produce CO2 and H20 as shown by the equation below:

    C2H6 + O2 - > CO2 + H20

    The equation above is not balance. To balance the equation, do the following:

    There are 2 atoms of C on the left side of the equation and 1atom on the right. It can be balance by putting 2 in front of CO2 as illustrated below:

    C2H6 + O2 - > 2CO2 + H20

    There are 6 atoms of H on the left side and 2 atoms on the right side. It can be balance by putting 3 in front of H2O as illustrated below:

    C2H6 + O2 - > 2CO2 + 3H20

    Now, there are a total of 7atoms of O on the right side and 2 atoms on the left. It can be balance by putting 7/2 in front of O2 as shown below:

    C2H6 + 7/2O2 - > 2CO2 + 3H20

    Multiply through by 2 to clear the fraction as shown below:

    2C2H6 + 7O2 - > 4CO2 + 6H20

    Now the equation is balanced.

    The coefficients are 2, 7, 4, 6
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