What is the mass of ONE water molecule?

1 Answer
anor277
Apr 30, 2017

Pretty small...........

Explanation:

You know that one mole of water, i.e. #N_A# water molecules, has a mass of #18.01*g#. And thus to get the mass of ONE water molelcule, we divide this molar mass by #N_A=6.022xx10^23#

And so #"mass of one water molecule"=(18.01*g*mol^-1)/(6.022xx10^23*mol^-1)# #=# #??g#

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