Question

number of moles present in 12gm of oxygen​

Answer 1

given mass= 12 gm

molar mass of oxygen ( O2)= 32gm

moles = given mass/ molar mass

= 12/32

= 3/8 moles

hope it helps u ........

Answer 2

Answer:

16 gm = 1 mol Oxygen

1 gm = 1/16 mol

12 gm = 1/16 × 12 mol

= 3/4 mol