Question

The mass of half mole of electrons is about
(mass of electron= 9.1 * 10^-28g)

Answer 1

1 mole is \(6.022*10^{23}\) anything (in this case electrons), it's called Avogadro's number. so multiply the mass of one by half of avogadro's number.

Answer 2

1mole of electrons has a mass of 9.1*10^-28

so 1/2 moles would be 1/2*9.1*10^-28 ??

Answer 3

yes

Answer 4

then where we have to use the avogadro's number

Answer 5

each electron weighs 9.1*10^-28g. One mole of electrons would weigh\[9.1*10^{-28g} * 6.02*10^{23}\] but you only have half a mole of electrons. Divide that by 2 and you'll have the mass of half a mole of electrons

Answer 6

thank u!