Question

Balance equation. been working on this for almost 5 hours now, just cant do it.
HCl+As2O3+NaNO3+H2O-->NO+H3AsO4+NaCl

Answer 1

Piece a cake.
Check out the site for balancing equations.
4HCl + 3As2O3 + 4NaNO3 + 7H2O --> 4NO + 6H3AsO4 + 4NaCl

http://www.chemteam.info/Redox/Redox.html