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How many hydrogen atoms are present in two water molecules?

Answer and explanation

Correct answer: 4

The formula H₂O gives the atomic composition of one water molecule: two hydrogen atoms and one oxygen atom. For two water molecules, multiply the hydrogen count by two: 2 molecules × 2 hydrogen atoms per molecule = 4 hydrogen atoms. Therefore option B is correct. Option A counts only one water molecule, while options C and D do not follow the subscript in the formula or the stated number of molecules.

Related tags

Water MoleculesChemical FormulaAtom CountingHydrogenChemistryChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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