Assign oxidation number of each atom in the following equation

Question

HI .PBr. CaCO3.H3PO4.As2O3.H2SO4

Answer 1

Not A right question

Answer 2

Here is the main menu for CHEMTEAM which is a very good source for chemistry questions. Click on the reduction/oxidation link and that will give you VERY good instructions about assigning oxidation state values
://www.chemteam.info/ChemTeamIndex.html