if i have 1 mole of oxygen, how many grams do i have?
Molar mass of O = 15.9994 g/mol
You would have 0.0625023438379Grams
If you have oxygen atoms and NOT O2 molecules, look for the ATOMIC MASS on the bottom of the Periodic Table of Elements... 15.999 gms
oh, My bad. Fail!
The mole of any element, in grams, is equivalent to the atomic weight or mass of that element. Example: Carbon 12 has atomic mass of about 12. Therefore, 1 mole of carbon 12 must have 12 grams.
+8581 
