[" Calculate the percentage camposition of the various elements in "],[mg" so,"]

Calculate the percentage composition of various elements in : Sodium carbonate, Na_2CO_3 Given that the relative atomic masses of O = 16, Na = 23 and C = 12.

Calculate the percentage composition (by mass) of the constituent elements of sodium sulphate (Na_(2)SO_(4)) .

Calculate the percentage composition of each element in Potassium chlorate, KClO_3 .

Calculate the mass percentage composition of the elements in nitric acid (H=1 ,N=14, O=16) .

(i) Calculate the mass percentage of various elements present in magnesium sulphate, MgSO_(4) (ii) Calculate the percentage of cation in ammonium dichromate.

Calculate the mass percentage of each element in water (H_(2)O)