Chemistry

Question Analysis
This question evaluates the student's ability to determine the molecular formula from the empirical formula and the molar mass.

Key Concept Explanation
The molecular formula is a multiple (n) of the empirical formula, where n is determined by dividing the molar mass of the compound by the molar mass of the empirical formula.

Step-by-step Solution
1. Calculate the molar mass of the empirical formula C₃H₄: (3 × 12.01) + (4 × 1.008) = 41.062 g/mol.
2. Determine the value of n: n = 120 g/mol ÷ 41.062 g/mol ≈ 2.92 (round to the nearest whole number, n = 3).<...