To determine the mass of CO2 that forms from a given mass of CaCO3, which of the following must be known? Check all that apply.

(Which do I choose?)

-molar mass of CaCO3
-molar mass of CaO
-mole ratio of CaCO3 to CO2
-mole ratio of CaO to CO2
-molar mass of CO2
-mass of CaO formed