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Find the amount of known substance present in the mixture.

A mixture of calcium carbonate and calcium oxide that weighed 1.727g was heated until all the calcium carbonate was decomposed to calcium oxide .after heating the sample weighed 1.551g. Calculate the mass of calcium carbonate present in original mixture.

Finding the Thermodynamic parameters (Enthalpy of the reaction).

How many liters of cyclohexane need to be burned to release as much energy as burning 10.0 Ib of pine logs? The density of cyclohexane is 0.7785g/mL, and its DeltaH comb = -46.6kj/g.

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