21. Solving a chemistry problem
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21. Solving a chemistry problem
264. Complete the reaction equations and, using the ion-electron method, equalize them.
KCrO2 Br2 KOH →K2CrO4
KMnO4 H2O2 H2SO4→MnSO4 O2….
NaClO3 H2S → H2SO4
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