Which of the following has maximum number of atoms?

Options

A. 18g of `H_(2)O`
B. 18g of `O_(2)`
C. 18g of `CO_(2)`
D. 18g of `CH_(4)`

Answer

D

Explanation

(d)
`("Mass of substance"xx "No. of atoms in one molecule")/("Molar mass of substance") xxN_(A)`
(a) ` ((18g)xx3)/((18g)) xxN_(A) =3N_(A)`
`(b) ((18g)xx2)/((32g))xxN_(A)=1.23 N_(A)`
(c) `((18g)xx3)/(44g))xxN_(A)=1.23 N_(A)`
(d) ((18g)xx5)/((16g))xxN_(A) =5.63 N_(A)`