8. Solving a chemistry problem
92. In which of the following substances can sulfur exhibit only reducing properties: S, K2SO4, H2SO3, H2S, FeS, Na2S2O3, SO2. Select the coefficients in the OVR equation using the electron balance method: FeCl2 H2SO4(c) Fe2(SO4)3 SO2 HCl H2O.
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