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What is the atomic mass and number for H2O?

Updated: 8/11/2023
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Crazy143LOL

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11y ago

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The Atomic Mass of H2O is 18.01528amu. Each hydrogen atom has a mass of 1.00794amu and the oxygen atom has a mass of 15.9994amu. There is not atomic number for H2O, as it is a compound, not an element.

H: 2 x 1.00794amu = 2.01588amu

O: 1 x 15.9994amu = 15.9994amu

Total = 18.01528amu

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Wiki User

11y ago
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Wiki User

11y ago

water is not an element. it don't have an atomic number. its molecular formula is

H2O.

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