Time left 1:15:1 A mixture of CaCO3(s) and CaO(s) weighing 0.810 g was heated. The evolved CO2(g) of 150 mL is collected over water at 26 C and a barometric pressure of 386.75 mmHg Vapor pressure of water at this temperature is 25.2 mmHg, calculate the mass percent of CaCO3 (s) in the original mixture. O a. 61% O b. 51% Od 57% Oe5496