Question

Calculate the number of electrons which will wait 1 gram

Answer 1

mass of 1 electron = 9.1 × 10^-28g
mass of ' n ' electrons = 1g

(cross multification)

n × 9.1 × 10^-28 = 1 × 1

n = 1/9.1×10^-28

n = 0.1098 × 10^28

n = 1.099 × 10^27

so number of electron is 1.099 × 10^27

[i.e 1099000000000000000000000000]