Practice question

Given: How many grams of N₂ are required to produce 34 g of NH₃ in the reaction N₂ + 3H₂ -> 2NH₃ ? (Atomic masses: N = 14, H = 1) These values define the system as per NCERT data. Formula: Molar mass of NH₃ = 17 g/mol. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: Moles of NH₃ = 34 / 17 = 2 mol. 1 mol N₂ produces 2 mol NH₃. Moles of N₂ = 1 mol. Mass = 1 × 28 = 28 g. 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.