Question

Help balancing equations:
Au + H2(SeO4) -> Au2(SeO4)3 + H2(SeO3) + H2O

Answer 1

ok first count how many of each atoms you have on right side
ex.
4 * Se
then try to get on left side same amount of atoms by placing prefix numbers
ex.
4 H2(SeO4)

Answer 2

I understand how to balance them, i'm struggling though. The rules I was given was to balance any identical polyatomics first, then metals, then nonmetals (hydrogen and oxygen are last).

Answer 3

if you have the answer that would be most helpful, I can backtrack where I went wrong that way. this isn't a homework problem, i'm really just trying to understand where I'm going wrong