What is the charge on the compound SeBr4?

Question

How do I find that?

Answer 1

Since it is a compound, the charge is zero.  All compounds are neutral, they have no net charge.

Also, since SeBr4 is a covalently bonded molecule, neither the Se nor the Br will have a charge, either.  Perhaps you are thinking of oxidation numbers.  Sometimes oxidation numbers (which are assigned numbers) can resemble ionic charges.  

Oxidation numbers are assigned numbers that allow us to better understand redox reactions and to figure out the formulas of compounds.  For a compound, the sum of the oxidation numbers will always equal zero.

In SeBr4, Br will have an oxidation number of -1, and since there are four of them, the Se will have an oxidation number of +4.

SeBr4

+4 + 4(-1) = 0