Which of the following contains maximum number of molecules?

Options

A. 100 cc of `CO_(2)` at S.T.P.
B. 150 cc of `N_(2)` at S.T.P.
C. 50 cc of `SO_(2)` at S.T.P.
D. 150 cc of `O_(2)` at S.T.P

Explanation

Equal volume of all gases, under similar conditions of temperature and pressure contains equal number of molecules (Avogadro's Law)
`:.` 200 cc of `NH_(3)` at S.T.P. contains maximum number of molecules