1.

Which of the following has least mass

Answer»

2 g ATOM of nitrogen
`3xx10^(23)` atom of C
1 MOLE of S
7.0 g of Ag

Solution :(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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