How many moles of water are in 0.34g of water?

Answer 1

#"Number of moles"# #=# #"Mass"/"Molar mass"# #~=# #0.02*mol#

And thus, #(0.34*cancelg)/(18.01*cancelg*mol^-1)# #=# #(??)/(mol^-1)# #=# #??mol#

How many water molecules in such a quantity? Keep in mind that all I've done so far is set up the problem dimensionally. I want an answer in moles, and it appears that I got one, so I believe I did it correctly.

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Answer 2

Luna Chen

0.019 water moles.

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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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