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## Homework Statement

As + HNO3 (consentrated) -> H3AsNO4 + NO2 + H2O

## Homework Equations

none

## The Attempt at a Solution

I tried doing the electron equation:

As (0) - 1 electron = As (1+) | 1

N (5+) + 1 electron = N (4+) | 1

I don't know if this is right. (The last 2 numbers are supposed to represent the numbers which should go in the equation before those elements.)

Think the oxydation level is supposed to change, but the sides don't balance out. What am I doing wrong? I just can't get this out of my head anymore.

Thanks in advance,

fawk3s