ChemistryChemical combinationJAMB
What mass of oxygen combines with 4 g of hydrogen to form water? (H = 1, O = 16)
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Answer: B. 32 g
2H₂ + O₂ → 2H₂O: 4 g of H₂ is 2 moles, needing 1 mole (32 g) of O₂.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.