In the coulometric titration of U4+ in the presence of excess Ce3+, it was found to require 652 seconds to reach the equivalence point using a constant current of 100.0 mA. How many moles of U4 + were present in the solution? U 4++2Ce4++2H2O ⇄ UO2 2++2Ce3++4H+

Calcium carbonate decomposes at high temperatures to give calcium oxide and carbon dioxide as shown below. caco3(s) cao(s) + co2(g) the kp for this reaction is 1.16 at 800°c. a 5.00 l vessel containing 10.0 g of caco3(s) was evacuated to remove the air, sealed, and then heated to 800°c. ignoring the volume occupied by the solid, what will be the mass of the solid in the vessel once equilibrium is reached?