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fes + hno3 → fe no3 3 + n2o + h2so4 + h2o
fe hno3 fe no3 3 no h2o
fe no3 3 + h2so4
fe+hno3 fe no3 3+no2+h2o
feo+hno3 fe no3 3+no2+h2o
fe no3 3 + h2o2
fe3o4+hno3 fe no3 3+no+h2o
fe no3 2 + h2so4
fe3o4+hno3 fe no3 3+nxoy+h2o
fe no3 3 + hno3
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