Question

The ratio of number of moles of butane to the number of moles of oxygen necessary for complete combustion of butane is:

• A. $1:2$
• B. $2:3$
• C. $1:5$
• D. $2:13$

Answer 1

The correct option is D $2:13$

The reaction is:

$2C_4{H}_{10}+13O_2\to 8C{O}_2+10H_{2}O$

So, the ratio is $2:13$.