Practice question

Given: What is the percentage of hydrogen in 0.18 g of a compound that produced 0.18 g of H₂O in combustion analysis? (Atomic masses: H = 1, O = 16) These values define the system as per NCERT data. Formula: Molar mass of H₂O = 18 g/mol. This is standard NCERT relation. Substitution & Calculation: Mass of H = 2 × 0.18/18 = 0.02 g. Percentage = 0.02 × 100/0.18 = 11.11% . Result: The computed value matches expected outcome and confirms correct choice as per NCERT.