Calculate the part of `Fe_2O_3` and `SO_3` obtained from 15.2 grams of `FeSO_4`.

Iron (Il) oxide crystallise in cubic structure with unit cell edge of 5.0Å If the density of the oxide is 3.8 g cm-3 . Calculate the no. of Fe^2+ and O_2- present in each unit cell. [atomic mass of Fe=56, O=16]

Calculate the mass % of oxygen in Fe_(3)O_(4)

Calculate the oxidation number of Cr in Cr_2O_3 and S in H_2SO_4 .

Describe how pure Al_2O_3 obtained from bauxite?

Calculate the equivalent weight of SO_2 in the following reactions: (a) SO_(2) + 2H_(2) S = 3 S + 2H_(2) O (b) 5SO_(2) + 2KMnO_(4) + 2H_(2) O = K_(2) SO_(4) + 2MnSO_(4) + 2H_(2) SO_(4)

Second law of thermodynamics deals with the spontanelty of a process. Iron is extracted from the ore Fe_2O_3 . Using the date given above suggest whether the decomposition of Fe_2O_3 is feasible or not. Substantiate. (DeltaH^@= 824 kJ//mol, DeltaS^@ + 0.276 kJ//mol K, T = 298 K).

How much iron can be theoretically obtained by the reduction of 1 kg of Fe_2O_3 Atomic mass of Fe = 55.8.

Calculate the oxidation number of sulphur, chromium and nitrogen in H_2SO_4 , Cr_2O_7^(2-) , NO_3(-)

Calculate the oxidation number of sulphur and chromium in H_2SO_4 and Cr_2O_7^(2-) .