How many grams are in 1.90 x 10^14 molecules?

1 Answer
anor277
May 15, 2018

Well, we can work out how many moles....

Explanation:

...but we CANNOT work out how many molecules. Why? Because we don't know what the molecules are.... They could be dihydrogen molecules, the which have a molar mass of #2*g# or #UF_6# molecules, that have a molar mass of #352.1*g#, Are you clear on how to assess the molar mass?

One mole specifies #"Avogadro's number of particles"# #-=# #6.022xx10^23*mol^-1#...

And so here we got...#(1.90xx10^14*"molecules")/(6.022xx10^23*"molecules"*mol^-1)#

#="SFA moles...."#

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