Advanced Placement (AP), 29.08.2020 14:01, HalpMehPlz

A student demonstrates the reaction by mixing 25.00 g of H2SO4 with 25.00 g of CaCO3. Calculate the theoretical mass of the excess reactant.

Soon after mixing the reactants, the student determines that 33.17 g of CaSO4 was produced by the reaction. Is this a reasonable result? Show calculations to defend your answer.

The first two questions were about the number of moles of each reactant the student mixed and which is the limiting reactant. I got 2.55x10^-1 mol H2SO4 and approximately 2.5x10^-1 mol CaCO3, and that the limiting reactant is CaCO3. I'm pretty sure of these answers but I got stuck with the second two questions.

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A student demonstrates the reaction by mixing 25.00 g of H2SO4 with 25.00 g of CaCO3. Calculate the...