Question Detail
Question
What is the atomicity of a molecule of trinitrotoluene (TNT) with the formula C7H5(NO2)3?
Correct Answer
Option D is the correct answer.
Detailed Explanation
The formula C7H5(NO2)3 contains 7 C atoms, 5 H atoms, and within (NO2)3: 3 N atoms and 3*2=6 O atoms. Total atoms = 7 + 5 + 3 + 6 = 21 atoms.
Hint
Multiply the atoms inside the parentheses by the subscript outside before adding all atoms.