Which of the following weighs the least?

Options

A. 2 gram of atoms of Nitrogen
B. `3xx10^(23)` atoms of carbon
C. 20 g of Carbon dioxide
D. 1 mole of Sulphur dioxide

Answer

B

Explanation

(a) 2 gram atoms of Nitrogen `=2xx14 = 28 g`
(b)`3xx10^23` atoms of carbon `=(12xx3xx10^(23))/(6.02xx10^(23)) = 6 g`
( c)20 g of `CO_2`
(d)1 mole of `SO_2` = 64 g
Ans : `3xx10^(23)` atoms of carbon dioxide weighs least.