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20 April, 07:02

Determine the correct set of coefficients to balance the chemical equation. __c6h6 (l) + __o2 (g) ? __co2 (g) + __h2o (g)

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  1. 20 April, 10:21
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    To balance this equation, first we should consider balancing C because it only presents in one reactant and one product. Assuming the coefficient of C6H6 is 1, there are 6 C's in the reactant, so it generates 6CO2. Then consider balancing H for the same reason. If the coefficient of C6H6 is 1, there are 6 H's in the reactant, so it generates 3H2O.

    Now that the coefficient of the products are determined, we can balance O. There are 6*2=12 O's in CO2 and 3*1=3 O's in H2O. So the total number of O in the products is 12+3 = 15. O2 is the only reactant that contains O, so to balance the equation, the coefficient of O2 should be 15/2.

    Now the equation looks like:

    C6H6 + 15/2O2 ⇒ 6CO2 + 3H2O.

    Times both sides of the equation by 2 results the final answer:

    2C6H6 + 15O2 ⇒ 12CO2 + 6H2O
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