Question

An oxide of nitrogen has a molecular weight of 30. Find the total number of electrons in one molecule of the compound (At. No. of N = 7, O = 8)

Answer 1

Molecular weight of the oxide of nitrogen (30) indicates that the formula of oxide is NO (14 + 16 = 30) 

Total number of electrons in NO = No. of electrons in (At. No. of) N + No. of electrons in (At. No. of) O

= 7 + 8

= 15