5. (05.02 LC) What is the molar mass of H3PO4?
(Molar mass of H = 1.0079 g/mol; P = 30.974 g/mol; O = 15.999 g/mol) (3 points)
72.98 g/mol
78.22 g/mol
88.24 g/mol
97.99 g/mol

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?