A 0.1185 g sample of unknown calcium oxide is dissolved and transferred to a 100.00 mL volumetric flask. A 1.000 mL aliquot of this solution is titrated using 0.770 mL of 0.01015 M EDTA.

a) what is the number of moles of EDTA used?

b) If the number of moles of EDTA used is the same as the number of moles of Ca2+ present in the aliquot, then what is the concentration of calcium in the 100.00 mL solution that was made?

c) Lastly, since the unknown needs to be identified based on the % of CaO, convert the molarity of calcium determined in part c. into g of CaO, then divide the g CaO by the g unknown weighed out initially.