ChemistryChemical combinationWAEC
In the equation 2H₂ + O₂ → 2H₂O, the mass of water formed from 4 g of hydrogen is
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Answer: C. 36 g
4 g H₂ = 2 mol, giving 2 mol (36 g) of water.
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.