Answer to Question #179606 in Inorganic Chemistry for Alex

Question #179606

______C2H6  +  ______O2  -->  ______CO2  +  _______H2O


Calculate the mass of carbon dioxide formed when 7.80 g of benzene (C2H6) burns.


1
Expert's answer
2021-04-11T23:53:45-0400

C2H6 + 5O--> 2CO+ 6H2O

Molar mass of benzene = 78 g/mol

Mole benzene = 7.8 g/78 g/mol = 0.1 mol

From balanced equation, 2 moles of benzene burn in O2 to form 12 moles of CO2.

Therefore, 0.1 mol of benzene burns in Oto form (12/2) x 0.1 = 0.6 mol of CO2.

Molar mass of CO2 = 44 g/mol

Hence, mass of CO2 formed = 0.6 mol x 44 g/mol = 26.4 g


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