Question

Either my online portal hates me, or I don't understand how to balance properly.

QUESTION
Balance reaction of arsenic(III) sulfide with nitric acid As2S3(s) + NO3-(aq) → H3AsO4(aq) + S(s) + NO(g)

Is this the correct balanced equation?
32 H2O + 24 As2S3(s) + 80 H+(aq) + 80 NO3-(aq) → 48 H3AsO4(aq) + 9 S8(s) + 80 NO(g)

If yes, which is the oxidizing reagent and what is the reducing reagent?

Answer 1

oxidn is loss of electrons.
It is reduced.
Reduction is gain of electrons. It is the oxidizing agent. Isn't that NO3^-?
The equation looks balanced to me; one never knows these days if S8 or S is required.