How many no. Of gram atoms and atoms are present in 0.8 kg of Oxygen .(O)

32 gram of oxygen is equal to 1 gram atom so 800 gram of Oxygen will equal to 800 / 32 is equal to 25. That is. 8 kg of oxygen will be equal to 25 gram atom of oxygen.And one mole of Oxygen is equal to 6.02 into 10 to the power 23 atoms so 25 mole will contain 1.505 into 10 to the power 25 atoms.

I want gram atoms in O atom not in O2 molecule . 16 gm of O not 32 gm of O2.Please it`s urgent please plzzzzz

As you had written oxygen I took it O2If you want to find gram atoms in then you take simply mass of single oxygen that is 16 And re solve the question by above given method.