Practice question

Given: In the reaction CS₂ + 3O₂ -> CO₂ + 2SO₂, how many grams of SO₂ are produced from 19 g of CS₂? (Atomic masses: C = 12, S = 32, O = 16) These values define the system as per NCERT data. Formula: Molar mass of CS₂ = 12 + (2 × 32) = 76 g/mol. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: Moles of CS₂ = 19 / 76 = 0.25 mol. 1 mol CS₂ produces 2 mol SO₂. Moles of SO₂ = 0.25 × 2 = 0.5 mol. Mass = 0.5 × 64 = 32 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.