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

Options

A. 16 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 `64g` of `O_(2)`
D. 12 g of `C(s)` and 23 g of `Na(s)`

Answer

D

Explanation

(c) Number of atoms isn 28g of `N_(2)=(28)/(28)xxN_(A)xx2=2N_(A)` (whre, `N_(A)`=Avogadro number)
Number of atoms in 32 g of `O_(2)=(32)/(32)xxN_(A)xx2=2N_(A)`
(d) 12 g of C(s) contains atoms `=(12)/(12)xxN_(A)xx1=N_(A)`
Number of atoms in 23g of Na(s)`=(23)/(23)xxN_(A)xx1=N_(A)`