How many primary () hydrogen atoms are present in a single molecule of 2,2,4-trimethylpentane (isooc — GOC and Organic Chemistry Basics Chemistry Question

💡 Solution & Explanation

Isooctane has the structure $CH_3-C(CH_3)_2-CH_2-CH(CH_3)-CH_3$. Primary hydrogens are those attached to primary carbons (terminal methyl groups). There are 5 methyl groups: three on C2, one on C4, and C5. $5 \times 3 = 15$ primary hydrogens.