A) \[9.1\times {{10}^{-28}}g\]
B) 1.008 mg
C) 0.55 mg
D) \[9.1\times {{10}^{-27}}mg\]
E) none of these
Correct Answer: C
Solution :
One mole of electrons\[=6.023\times {{10}^{23}}\] electrons Mass of one electron\[=9.1\times {{10}^{-28}}g\] Mass of one mole of electron \[=6.023\times {{10}^{23}}\times 9.1\times {{10}^{-28}}g\] \[=5.48\times {{10}^{-4}}g\] \[\approx 0.55mg\]
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