Answer
The formula for isooctane is given as C(CH3)3CH2CH(CH3)2
Work Step by Step
1. Calculate the molecular mass of the given molecule isooctane.
2. Find the mass of hydrogen.
3. Using the formula for mass percent, Mass % of H= (mass of H)/(mass of isooctane) x 100 and substituting the values, the mass percent of H atom is calculated.
4. The mass percent of H in the isooctane is 15.8 % approx.