Some Basic Concepts Of Chemistry Question 201
Question: Which of the following has least mass [Pb. PET 1985]
Options:
A) $ 2\ g $ atom of nitrogen
B) $ 3\times 10^{23} $ atoms of $ C $
C) 1 mole of $ S $
D) $ 7.0\ g $ of $ Ag $
Show Answer
Answer:
Correct Answer: B
Solution:
A. 2gm atom of nitrogen = 28gm B. $ 6\times 10^{23} $ atoms of C has mass $ =12gm $
$ 3\times 10^{23} $ atoms of C has mass $ =\frac{12\times 3\times 10^{23}}{6\times 10^{23}}=6gm $
C. 1mole of S has mass = 32gm D. 7.0gm of Ag So, lowest mass = 6gm of C.
