Which of the following will weigh maximum amount-

Options

A. 40 g iron
B. 1.2 g atom of N
C. `1 times 10^(23)` atoms of carbon
D. 1.12 litre of `O_(2)` at STP

Answer

a

Explanation

(A) Mass of iron = 40 g
(B) Mass of 1.2 g atom of `N=14 times 1.2 =16.8 gm`
(C) Mass of `1 times 10^(23)` atoms of C
`=(12 times 1 times 10^(23))/(6.023 times 10^(23))=1.99gm`.
(D) Mass of 1.12 litre of `O_(2)` at STP
`=(32 times 1.2)/22.4=1.6g`