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calculate delta H rxn for: H3AsO4(aq) + 4H2(g) -> AsH3(g) + 4H2O(l) given delta Hf [AsH3(g)]: 66.4 kJ/mol delta Hf [H3AsO4(aq)]: -904.6 delta Hf [H2O(l)]:

calculate delta H rxn for: H3AsO4(aq) + 4H2(g) -> AsH3(g) + 4H2O(l)

given

delta Hf [AsH3(g)]: 66.4 kJ/mol

delta Hf [H3AsO4(aq)]: -904.6

delta Hf [H2O(l)]: -285.8

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