Question

Convert masses into moles - 64 g of O2

Answer 1

mole = given mass / molecular mass
mole = 64 / 32 ( o2 mass = 16 . 2 )
mole = 2

Answer 2

moles = wt in gm / molar mass

==> 64/32 = 2moles is the answer..

Hope it helps u..✌