Question

calculate 10 grams of oxygen with mole

Answer 1

one mole of oxygen weighs = 16g
10g of oxygen conatins $\frac{10}{16} g$
that is 0.625 mole.

Answer 2

molar mass of oxygen = 16 g
therefore number of moles in 10 grams,
n = m/M
n =10/16
n = 0.625
therefore the answer is 0.625 moles ....
i hope it helps..........