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What is the mass of one mole of water?
18 grams
The mass of one mole of any atom/molecule is equal to its atomic molecular mass in grams.
The molecular formula of water is ##H_2O##
The atomic mass of ##H## = 1
The atomic mass of ##O## = 16
In a sense, the formula means ##H## + ##H## + ##O##
So... 1 + 1 + 16 = 18
Therefore, the mass of one mole of water = 18 Grams