Question

The formula of magnesium oxide is mgo state the formula of Barium nitrate and Barium sulphate if barium belongs to same group as magnesium use cross multiplication method

Answer 1

Answer:

Barium Nitrate - Ba(NO3)2

Barium Sulphate - BaSO4

NO3- ion has -1 charge and Ba2+ has +2 charge. hence by cross multiplication

Ba(NO3)2

SO42- has -2 charge hence cross multiplication results in cancelation of +2 of Ba and -2 of SO4. Hence BaSO4.