How many molecules of water are there in 10.0g of H20?

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2007-10-28 10:13:45 · 2 answers · asked by chaseslaws12 2 in Science & Mathematics ➔ Chemistry

10 g = 10 g/18 g/mole = 0.556 moles
0.556 moles x 6.022x10^23 moles per mole = 3.346x10^23

2007-10-28 10:20:21 · answer #1 · answered by skipper 7 · 0⤊ 0⤋

Convert the mass to moles by dividing by the molar mass of H2O. Then, multiply by Avogadro's number to convert moles to molecules.

2007-10-28 10:17:03 · answer #2 · answered by hcbiochem 7 · 1⤊ 0⤋