Practice question

Given: What is the mass of one mole of ethanol (C₂H₅OH)? (Atomic masses: C = 12, H = 1, O = 16) These values define the system as per NCERT data. Formula: Molar mass = (2 × 12) + (6 × 1) + 16 = 46 g/mol.. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: Substituting values like 1.2 × 10⁻⁵, 236 J kg⁻¹ K⁻¹, CH₃CH₂NH₂ etc. into the formula and simplifying step by step. 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.