Molar Mass of CO2=44g
No of oxygen atoms in CO2 = 2× 88/44 × Avogadro's constant
no of oxygen atoms = weight of CO/28 × Avogadro's constant
no of oxygen atoms in CO2 = no of oxygen atoms in CO
2× 88/44 = weight of CO/28
weight of CO = 112 g
Do it in a paper and study.
Thank you :)