[Severed]

Ok, first off, nice to meet you all.

Secondly, I am trying to remember what to do here.

"what mass of H2O is present in a sample containing 3.24*10^26 molecules of H20?"


Seems pretty simplistic, but haven't tried it in a little while.

Also, thank you in advance.

[opti384]

Do you know the relationship between the mol and the number of molecules?

[Severed]

I believe so, is it "There are 6.02*10^23 amount of molecules contained within a mol"?

[opti384]

Then how many mols of H_2O are present if there are 3.24*10^26 molecules?

[Severed]

Then how many mols of H_2O are present if there are 3.24*10^26 molecules?

538 mols?

(3.24*10^26)/(6.02*10^26)

I have a feeling I'm going wrong somewhere.

[Borek]

Good, 538 moles it is.

That is, there is probably a typo in what you wrote, as

(3.24*10^26)/(6.02*10^26)

you most likely mean 6.02x10²³, not 10²⁶.

Now, just convert number of moles to mass.

[Severed]

Good, 538 moles it is.

That is, there is probably a typo in what you wrote, as

(3.24*10^26)/(6.02*10^26)

you most likely mean 6.02x10²³, not 10²⁶.

Now, just convert number of moles to mass.

Yes, that was a typo. :p

Ok, thank you both very much for your help, much appreciated.