Question

The mass of 1/2 moles of electron?

Answer 1

Answer:

→ 0.264 mg.

Step-by-step explanation :-

One electron weighs 9.109 x 10⁻²⁸ g.

→ 1 mole has 6.022 x 10²³ electrons.

Therefore, Mass of 1 mole of electron

=9.1 x 10⁻²⁸ x 6.022x 10²³.

=54.8 x 10⁻⁵ g.

Thus, Half mole of electron = ( 54.8 x 10⁻⁵)/2.

=27.4 x10⁻⁵ g.

=0.274 mg.

Hence, it is solved.

Answer 2

Answer:

Hi Dude.....

Good Noonn.....

Nice Question.......

Explanation:

Mass of one electron=9•1×10⁻³¹

Mass of one mole of electron=6×10²³×9•1×10⁻³¹ which is equal to 0•55 mg  

So mass of half mole of electron=0•225 mg

If it is helpful means just leave thnks..