What is the mass of ONE water molecule?

Answer 1

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

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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Answer 2

Cooper Anderson

The mass of one water molecule is approximately 18 atomic mass units (u) or daltons (Da).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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