Which of the following contains the same number of molecules ?

Options

A. 1g of `O_2`,2g of `SO_2`
B. 1g of `CO_2`, 1g of `N_2O`
C. 112 ml of `O_2` at STP, 224 ml of He at 0.5 atm and 273 K
D. 1g of oxygen, 1g of ozone

Answer

A,B,C

Explanation

For same number of molecules, number of moles should be same .