Methyl-t-butyl ether, ${\mathrm{C}}_5{\mathrm{H}}_{12}\mathrm{O}$, is added to gasoline to promote cleaner burning. How many moles of oxygen gas, ${\mathrm{O}}_2$, are required to burn 1.0mol of this compound completely to form carbon dioxide and water?

The reaction for this process as follows;

${\mathrm{C}}_5{\mathrm{H}}_{12}\mathrm{O}+\frac{15}{2}{\mathrm{O}}_2\to 5{\mathrm{CO}}_2+6{\mathrm{H}}_2\mathrm{O}$

Here, it can be seen that the moles required for the oxygen required are 7.5.

moles of ${\mathrm{O}}_2$ Required $=5+\frac{6}{2}-\frac{1}{2}=\frac{15}{2}$moles

$=7.5$ moles.

Also after completion the moles of oxygen released are 6.