Determine the total number of primary () hydrogen atoms present in one molecule of isooctane (2,2,4- — Hydrocarbons Chemistry Question

💡 Solution & Explanation

Isooctane (2,2,4-trimethylpentane) has the structure $(CH_3)_3C-CH_2-CH(CH_3)_2$. Analyzing the structure, there are 5 methyl ($-CH_3$) groups. Since each methyl group is attached to only one other carbon, their hydrogen atoms are primary. $5 \times 3 = 15$ primary hydrogens in total.