Count the total number of primary () hydrogen atoms in one molecule of 2,2,4-trimethylpentane (isooc — IUPAC and Nomenclature Chemistry Question

💡 Solution & Explanation

The structure of 2,2,4-trimethylpentane is $CH_3-C(CH_3)_2-CH_2-CH(CH_3)-CH_3$. It has five primary carbon atoms (the terminal methyl groups). Each primary carbon has 3 hydrogens. Total $1^\circ$ H atoms = $5 \times 3 = 15$.