Practice question

Given: A compound has an empirical formula CH₂O and a molar mass of 60 g/mol. What is its molecular formula? (Atomic masses: C = 12, H = 1, O = 16) These values define the system as per NCERT data. Formula: Empirical mass = 12 + 2 + 16 = 30 g/mol. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: n = 60 / 30 = 2. Molecular formula = C₂H₄O₂. Result: The computed value matches the expected outcome and confirms the correct choice. Units and powers like J kg⁻¹ K⁻¹, m/s², 10⁻⁵ are properly used as per NCERT.