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8 February, 02:24

Write a balanced chemical equation for the reaction that occurs when heptane, C7H16 (l), burns in air.

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  1. 8 February, 03:26
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    Start with Unbalanced Equation and balance it, so ...

    C7H16+O2--->CO2+H2O

    There are 7 C atoms on the left-hand side, so we need 7 C atoms on the right-hand side. Add a 7 in front of the CO2 ... 7CO2+H2O on right side now.

    We have fixed 16 H atoms on the left-hand side, so we need 16 H atoms on the right-hand side. Add an 8 in front of H2O to make 16 (8x2) ... 7CO2+8H2O on right side now.

    There are 22 O atoms on the right-hand side: 14 from the CO2 and 8 from the H2O. Add an 11 in front of the O2 on the left side to make 22 (11x2).

    Every formula now has a fixed coefficient. You should have a balanced equation of ...

    C7H16+11O2--->7CO2+8H2O
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