Analyzing each atom in each side:
H → +1
O → -2
N of NO2:
x + 2(-2) = 0
x = +4
You may want to reference (Pages 145 - 148) Section 4.5 while completing this problem.
The commercial production of nitric acid involves the following chemical reactions:
In the following redox reaction identify the element undergoing oxidation and the element undergoing reduction.
3 NO2(g) + H2O(l) → 2 HNO3(aq) + NO(g)
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