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If the reaction below proceeds with a 96.8% yield, how many kilograms of CaSO4 are formed when 5.27 kg SO2 reacts with an excess of CaCO3 and O2?

2 CaCO3(s) + 2 SO2(g) + O2(g) 2 CaSO4(g) + 2 CO2(g)

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http://www.jiskha.com/science/chemistry/stoichiometry.html
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why is the enthalpy chance for a reaction proportional to the quantity of reactants

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