Chemistry

When the equation below is balanced and all coefficients are in the lowest, whole number ratio, the coefficients are:
C2H6 + O2 �¨ CO2 + H2O

I am currently doing an online worksheet to improve in chemistry and I am not quite understanding how to find the coefficients and how to solve problems like these. Any help would be greatly appreciated. Thanks.

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  1. C2 yields 2CO2
    H6 yields 3H2O
    but that leaves us with 7O, and O only comes in O2 molecules. So, double everything to get

    2C2H6 + 7O2 = 4CO2 + 6H2O
    on the left: 4C 12H 14O
    on the right: 4C 12H 14O
    it balances

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