Question

For complete combustion of an organic compound needs 8 molecules of oxygen, what could the formula of this compound be?

Answer 1

C5H12.

Step-by-step explanation:

The compound will be C5H12.

Now consider the general formula for the combustion of an alkane;

CnH2n+2 + 3n+1/2O2-----> nCO2 + (n+1) H2O

If we substitute n=5, we have;

C5H12 + 8O2-----> 5CO2 + 6H2O

Hence the answer above.