Practice question

Given: How many grams of NH₃ are produced from 14 g of N₂ with excess H₂ in the reaction N₂ + 3H₂ -> 2NH₃ ? (Atomic masses: N = 14, H = 1) These values define the system as per NCERT data. Formula: Moles of N₂ = 14 / 28 = 0.5 mol. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: 1 mol N₂ produces 2 mol NH₃. Moles of NH₃ = 0.5 × 2 = 1 mol. Molar mass of NH₃ = 17 g/mol. Mass = 1 × 17 = 17 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.