If the volume of the system is decreased at constant temperature, relative to the original...

If the volume of the system is decreased at constant temperature, relative to the original equilibrium mixture, which of the following will be true when equilibrium is reestablished? (Select all that apply.)

(a) There will be more CaCO3(s).

(b) There will be more CaO(s).

(c) There will he more CO2(g).

A sample of gaseous hydrogen iodide is in equilibrium with its decomposition products in a closed system: