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The unbalanced equation is C3H2 + O2 --------> CO2 + H20 Balance carbon: C3H2 + O2 --------> 3 CO2 + H2O Balance hydrogen: C3H2 + O2 --------> 3 CO2 + 4H2O Balance oxygen: CzHg + 5 02 --------> 3 CO2 + 4H2O The balanced equation is CzH3 +5 02 --------> 3 CO2 + 4 H20 Sum of the coefficients = 1 + 5 +3 +4 = 13
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