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Posted by on Friday, April 15, 2011 at 10:16am.

2C2H6 +7O2 --> 4CO2 + 6H2O
If 6 moles of O2 are used in the following reaction, how many grams of CO2 will be produced?

  • Chemistry - , Friday, April 15, 2011 at 10:26am

    2C2H6 +7O2 --> 4CO2 + 6H2O
    since this is already a balanced equation, we can now use their stoich coefficients for the ratios.
    first, since we need grams of CO2, we find it's molecular mass. from the periodic table, the masses of C and O are
    C = 12 and O = 16 , thus
    1*12 + 2*16 = 44 g/mol
    therefore,
    6 mol O2 * (4 mol CO2 / 7 mol O2) * (44 g CO2 / 1 mol CO2) = 150.86 g CO2

    hope this helps~ :)

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