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Calculate the percentage, by mass, of carbon in cyclohexane. Give your answer to two significant figures.
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Please give the definition of Le Chatilier's principle. Use this to explain what would happen if you increased the temperature of an equilibrium in which the forwards reaction is exothermic.
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Anhydrous magnesium chloride, MgCl2, can absorb water to form the hydrated salt MgCl2.4H2O. Suggest one reason why the enthalpy change for this reaction cannot be determined directly by calorimetry.
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