Question

Calculate the number of electrons which will together weigh one gram.

Answer 1

Mass of one electron = 9.10939 × 10^–31 kg
Number of electrons that weigh 9.10939 × 10^–31 kg = 1
Number of electrons that will weigh 1 g (1 × 10^–3 kg)

=1/9.10939*10^-31*(1*10^-3 kg)

= 0.1098 × 10^{–3 + 31}
= 0.1098 × 10²⁸
= 1.098 × 10²⁷