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2. A mixture of CoSO4 and its hydrate CoSO4.7H2O has a mass of 1.3762g. After heating to drive off all the water, the mass is

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2. A mixture of CoSO4 and its hydrate CoSO4.7H2O has a mass of 1.3762g. After heating to drive off all the water, the mass is only 0.9304g. What is the weight percentage of CoSO47H2O in the original mixture? Report your answer to 4 significant figures. Molar masses: CoSO4155.00g/mol;CoSO47H2O281.10g/mol

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