Answer to Question #95852 in General Chemistry for Kyli Dean

Question

If 7.97 mol of C5H12 reacts with excess O2, how many moles of CO2 will be produced by the following combustion reaction?

C5H12 + 8O2 ⟶ 6H2O + 5CO2

Answer 1

The balanced equation for considered reaction can be written as follows

$C_5H_{12} + 8 O_2 \rightarrow 6 H_2O + 5 CO_2$

$\frac{\nu(C_5H_{12})}{n(C_5H_{12})} = \frac{\nu(CO_2)}{n(CO_2)}$

where $\nu$ - amount of the substance, $n$ - number of the substance molecules within the balanced equation.

$\nu(CO_2)=\frac{\nu(C_5H_{12}) \cdot n(CO_2)}{n(C_5H_{12})}$

$\nu(CO_2)=\frac{7.97 \cdot 5}{1} = 39.75 \; mol$

Answer: 39.75 mol.