Question

2500 cc of oxygen was burnt with 600 cc of ethane . Calculate the volume of unused oxygen and the volume of carbon dioxide formed.

Answer 1

2C2H6 +7O2 →4CO2 +6H2O

 2V       7V       4V

Now from the equation, 2V of ethane reacts with = 7 V of oxygen

So, 600cc of ethane reacts with= fraction numerator 600 cross times 7 over denominator 2 end fraction space equals space 2100 space c c

Hence, unused O2 is = 2500 - 2100 = 400 cc

From 2V of ethane = 4 V of CO2 is produced

So, 600cc of ethane will produce =fraction numerator 600 cross times 4 over denominator 2 end fraction space equals space 1200 space c c CO2

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