Question: 2 C 2 H 6 ( g ) + 7 O 2 ( g ) 4 C O 2 ( g ) + 6 H

2C2H6(g)+7O2(g)4CO2(g)+6H2O(g)H=-2855kJmolrxn
In a certain experiment, 125gC2H6(g) and 375gO2(g) were added to a previously evacuated
reaction vessel. The reaction mixture was sparked and the reaction represented by the equation
shown above occurred until one of the reactants was completely consumed.
(a) Convert each quantity of reactant into mol ?rxn.
2C2H6(g)+7O2(g)4CO2(g)+6H2O(g)H=-2855kJmolrxn In a certain experiment, 125gC2H6(g) and 375gO2(g) were added to

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