Calculate which of the two compounds – Calcium nitrate or ammonium sulphate has a higher.perceritage of nitrogen. [Ca=40, N=14, 0=16, S=32, H=1]

Calculate the percentage of nitrogen in ammonium nitrate. [NH_4NO_3] [N=14 , H=1, O=16]

Calculate the percentage of water molecules in hydrated calcium sulphate . [Ca=40 , S=32 , O=16 , H=11]

Calcium nitrate decomposes on heating according to the equation : 2Ca(NO_3)_(2)to2CaO+4NO_(2)+O_(2) The relative molecular mass of calcium nitrate is 164. Calculate : the weight of calcium oxide obtained when 16.4 g of calcium nitrate is heated to constant weight. (Ca = 40, O = 16, N = 14)

Calculate the relative molecular masses (or molecular weights) of the following compounds: Ammonium sulphate, (NH_4)_2SO_4 Given that the relative atomic masses (in amu) of Cu = 63.5, S = 32, O = 16, N= 14 and C = 12

In the estimation of sulphur by carius methode 0.480g of organic compound give 0.699 g of Barium sulphate. The percentage of sulphur in the compound is (Atomic masses , Ba=137, S=32, O=16)

Calculate the percentage of nitrogen and oxygen in ammonium nitrate. [Relative molecular mass of ammonium nitrate is 80, H = 1, N = 14, O = 16).

Calculate the percentage of nitrogen in urea NH_2CONH_2 . Given : R.M.M. of N = 14, C = 12 , O = 16, H = 1 ?

Calculate the following: The percentage of water of crystallisation in MgSO_4.7H_2O [Mg =24, S=32, 0=16, H=1]

Calculate the relative molecular masses (or molecular weights) of the following compounds : Cane sugar , C_12H_22O_11 Given that the relative atomic mass (in amu) of Cu = 63.5 , S=32 , O=16 , N=14 , C=12

Both sodium sulphate (Na_(2)SO_(4)) and sodium sulphite (Na_(2)SO_(3)) are the compounds of sodium, sulphur and oxygen. By calculations prove that the quantity of oxygen in sodium sulphate is greater than that in sodium sulphite. (R.A.M. : Na = 23, S = 32, O = 16.]