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17 August, 08:34

What coefficients are needed to balance the equation for the complete combustion of methane? enter the coefficients in the order ch4, o2, co2, and h2o, respectively.

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  1. 17 August, 08:36
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    The balanced equation is

    CH4 (g) + 2O2 (g) - > CO2 (g) + 2H20 (g)

    start with the given mass of Ch4, then convert it to moles, use the stoichiometric ratio and finally convert the number of moles to grams:

    mass of CO2 = 7.20x10^-3g CH4 (1mol CH4 / 16.042g) x (1mol CO2 / 1mol CH4) x (44.01g / 1mol CO2) = 0.198g

    mass of H2O = 7.20x10^-3 g CH4 (1 molCH4 / 16.042g) x (2mol H2O / 1molCH4) x (18.00g / 1mol H2O) = 0.0162g

    mass of O2 = 7.20x10^-3g Ch4 (1mol/16.042g) x (2 mol O2 / 1molCh4) x (32.00g/1mol O2) = 0.0287g
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