d and f BLOCK ELEMENTS

What is the coefficient of Sn^4+ in the balanced half-reaction for the oxidation of tin(II) by dichromate?

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What is the coefficient of H+ produced in the balanced half-reaction for the oxidation of H2S by dichromate?

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What is the coefficient of S (elemental sulfur) in the balanced half-reaction for the oxidation of H2S by dichromate?

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What is the coefficient of H2S in the balanced half-reaction for its oxidation by dichromate?

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What is the coefficient of e- in the balanced half-reaction for the oxidation of iodide ions by dichromate?

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