How many water molecules are in $0.15$ moles of $"H"_2"O"$ ?

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Answer 1 · 2018-02-21T16:34:42

$9.0 xx 10^22$ molecules.

$1$ mole has $6.022 xx 10^23$ molecules.

Thus, $0.15$ or $3//20$ moles has

$(6.022xx3xx10^23)//20 = 9.0xx 10^22$ molecules of water

How many water molecules are in 0.150.15 moles of "H"_2"O""H"_2"O"?