Question

The total mass of 1 mole of electrons is(in mg)

Answer 1

1 electron has mass of =9.1×10 to the power - 31 kg

1 mole has 6.023×10 to the power 23 particles

So 1 mole of electron has mass 9.1×10 to the power - 31 ×6.023×10 to the power 23 =5.481 ×10 to the power - 7 kg

Hope it will help u......

Answer 2

Answer: 0.548 mg

Explanation:

A mole is defined as the amount of substance that contains Avogardro number of the substance. Avogadro's number is given by $6.022\times 10^{23}$.

$1mole=6.022\times 10^{23}electrons$

$1kg=10^6mg$

Mass of 1 electron =$9.1\times 10^{-31} kg$ = $9.1\times 10^{-25} mg$  

Mass of $6.022\times 10^{23}$ electrons= $\frac{9.1\times 10^{-25}}{1}\times 6.022\times 10^{23}=54.8\times 10^{-2}mg=0.548mg$

The total mass of 1 mole of electrons is 0.548 mg