A) 0.55 mg
B) 0.95 mg
C) 1.005 mg
D) \[9.1\times {{10}^{-28}}mg\]
Correct Answer: A
Solution :
We know that the mass of electron \[=9.1\times {{10}^{-28}}g\] Hence, mass of one mole \[=9.1\times {{10}^{-28}}\times 6.02\times {{10}^{23}}\] \[=54.78\times {{10}^{-5}}gm=0.55\text{ }mg\]
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