Molar Mass of H₂O (Water)

Free online molecular weight calculation with detailed element breakdown

Molar Mass
18.02 g/mol
≈ 18 g/mol (rounded)
Element Breakdown
SymbolElementAtomsAtomic MassSubtotal%
O Oxygen 1 15.9990 15.9990 88.81%
H Hydrogen 2 1.0080 2.0160 11.19%

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