MCQ
Which of the following has least mass
- A$2\;g$ atom of nitrogen
- ✓$3 \times {10^{23}}$ atoms of $C$
- C$1$ mole of $S$
- D$7.0\;g$ of $Ag$
✓
Answer
Correct option: B.
$3 \times {10^{23}}$ atoms of $C$
b
(b) $( a)$ $2\,gm $ atom of nitrogen $= 28\,gm$
(b) $( a)$ $2\,gm $ atom of nitrogen $= 28\,gm$
$(b)$ $6 \times {10^{23}}$ atoms of $C$ has mass $ = 12\,gm$
$3 \times {10^{23}}$ atoms of $C$ has mass $ = \frac{{12 \times 3 \times {{10}^{23}}}}{{6 \times {{10}^{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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