Question: what is g in oxygen?
Answer: Oxygen's atomic weight is 16.00 amu. 1 mole of oxygen is 6.02 x 1023 atoms of oxygen 1 amu = 1.661 x 10-24g What is the molar mass (g/mole) of oxygen? ... Molar mass (in grams) is always equal to the atomic weight of the atom!