Question

$8$ g of oxygen ($O_2$) has same number of atoms in :

• A. 2 g $H_2$
• B. 4 g $H_2$
• C. 12 g $O_3$
• D. 16 g $O_3$

Answer 1

Answer: (C)

12 g $O_3$

$8$g oxygen has $N_a/4$ atoms.
$2$g $H_2$ have $N_a$ atoms.
$4$g $H_2$ have $2N_a$ atoms.
$12$g $O_3$ have $N_a/4$ atoms.
$16$g $O_3$ have $N_a/3$ atoms.