Error:
H2O %2B KMnO4 %2B NaBr %3D NaOH %2B KOH %2B MnO2 %2B Br2
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Unexpected character ('%')H2O %2B KMnO4 %2B NaBr %3D NaOH %2B KOH %2B MnO2 %2B Br2
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Unexpected character ('%')