Question

The mass of one mole of electron is:

• A. $0.55mg$
• B. $0.95mg$
• C. $1.005mg$
• D. $9.1\times 10^{-28}mg$

Answer 1

Answer: (A)

We know that the mass of electron
$=9.1\times 10^{-28}g$
Hence, mass of one mole
$=9.1\times 10^{-28}\times 6.02\times 10^{23}$
$=54.78\times 10^{-5}gm=0.55mg$