Question

The total number of electrons in 4.2g of N^3- ion is ?

Answer 1

Number of electrons in 1 N3- ion = 22

Thus number of electrons in 1 mole of N3-=22* Na (Na=Avogadro's number= 6.022*10^23)

1 mole of N3- weighs 42gm.

Thus number of moles of N3- in 4.2 grams = 0.1.

Thus number of electrons in 0.1 or 4.2 gm of N3- is 22*Na*0.1= 13.2484*10^23