Practice question

Given: How many molecules are in 22 g of CO₂? (Molar mass = 44 g/mol, Avogadro number = 6.022 × 10²³) These values define the system as per NCERT data. Formula: Moles = 22 / 44 = 0.5 mol. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: Molecules = 0.5 × 6.022 × 10²³ = 3.011 × 10²³. 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.