Question

what is the number of electrons that would weight 1kg ? mass of an electron is 9.11 ×10^-31.​

Answer 1

Mass of electron = 9.1 x 10-31K One mole of electrons = 6.023×1023

Mass of 1 mole of electrons = 6.023×1023 x 9.1 x 10-31Kg

We need to find out moles of electrons in 1 Kg Hence out moles of electrons in 1 Kg

= 1kg x 1mole/ 6.023×1023 x 9.1 x 10-31Kg

=1.825 x 106 moles of electrons.

Answer 2

Step-by-step explanation:

1kg=no. of electrons×mass of one electron.

1kg=no. of electrons×9.1x10^-31kg

1/10^-31kg=no. of electrons

10^31/9.1=no. of electrons

10x10^30/9.1=no.of electrons

1.0989x10^30=no. of electrons

which is approximately equal to 1.1×10^30 electrons

therefore,1.1×10^30 electrons together weigh a total of 1kilogram.