1.

Which of the following has least massA. 2 g atom of nitrogenB. `3xx10^(23)` atom of CC. 1 mole of SD. 7.0 g of Ag

Answer» Correct Answer - B
(a) `2` gm atom of nitrogen `=28 gm`
(b) `6xx10^(23)` atoms of C has mass `=12` gm
`3xx10^(23)` atoms of C has mass `=(12xx3xx10^(23))/(6xx10^(23))=6 gm`
(c) 1 mole of S has mass `=32` gm
(d) 7.0 gm of Ag
So, lowest mass `=6` gm of C.


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