Sunday 12 August 2012


Chemical reaction question?

Can someone help me with this problem?
44.3 grams of C6H6 reacts with 122.4 grams of O2. How much CO2 will be produced by this reaction?
2C6H6 + 9O2 -> 6CO2 + 6H2O

Best Answer - Chosen by Voters

Number of moles of C6H6 = 44.3/78 = 0.568 mol
Number of moles of O2 = 122.4/32 = 3.825 mol

C6H6 is the limiting reactant because 0.568 mol of C6H6 needs
9/2 x 0.568 = 2.556 mol of O2 to react.

There are 3.825 mol of O2 available. So O2 is in excess.

Hence, the number of moles of CO2 produced = 6/2 x 0.568 mol
......................................… 1.704 mol of CO2
......................................… 74.98 g of CO2

If the experiment is carried out at room temperature, then the volume of CO2 produced = 1.704 x 24 dm3 = 40.90 dm3

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