Practice question

Given: How many grams of NH₃ are produced from 7 g of N₂ in the reaction N₂ + 3H₂ -> 2NH₃ with excess H₂? (Atomic masses: N = 14, H = 1) Formula: Moles of N₂ = 7 / 28 = 0.25 mol. Substitution & Calculation: 1 mol N₂ produces 2 mol NH₃. Moles of NH₃ = 0.25 × 2 = 0.5 mol. Molar mass of NH₃ = 17 g/mol. Mass = 0.5 × 17 = 8.5 g. Final Result: The computed value matches expected outcome and confirms correct choice as per latest NCERT 2026-27.