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27 October, 17:04

Which of the following combustion reactions is balanced correctly? A. C4H6 + 5.5O2 4CO2 + 3H2O B. C4H6 + 4O2 4CO2 + 3H2O C. C4H6 + 11O2 4CO2 + 3H2O D. C4H6 + 1.5O2 4CO2 + 3H2O

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  1. 27 October, 19:31
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    You must verify that the number of atoms of each type is equal on both sides of the chemical equation: same number of C, same number of H and same number of O on both sides.

    A. C4H6 + 5.5O2 - - - > 4CO2 + 3H2O

    element reactant side product side

    C 4 4

    H 6 3*2 = 6

    O 5.5 * 2 = 11 4*2 + 3 = 11

    Then, this equation is balanced.

    Do the same with the other equations if you want to verify that they are not balanced.

    Answer: option A.
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