Friday
July 25, 2014

Homework Help: chemistry

Posted by Anonymous on Monday, November 22, 2010 at 10:56pm.

when a 8.77g mixture of methane, and ethane is burned in oxygen at constant pressure, 476.6kJ of heat is liberated. What is the percentage by mass of CH4 in the mixture? The standard enthalpies of combustion for CH4 and C2H6 are -890.3kJ/mol and -1569.7kJ/mol, respectively.

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