Which of the following pairs have the same number of atoms ?

Options

A. 16 g of `O_(2)(g)` and 4 g of `H_(2)(g)`
B. 16 g of `O_(2)` and 44 g of `CO_(2)`
C. 28 g of `N_(2)` and 32 g of `O_(2)`
D. 12 g of C(s) and 23 g of Na(s)

Answer

C, D

Explanation

28g of `N_(2)` and 32 g `O_(2)` both represent 1 mole and have same no. of atoms.
`= 2 xx N_(A)`
12 g of C(s) and 23 g of Na (s)k represent 1 gram atom and have same no. of atoms `(N_(A))`