Identify the type of chemical reaction: Ex. ZnCl2(aq) + Mg(s) → Zn(s) + MgCl2(aq) -> Single replacement

2KOH(aq) + CuSO4(aq) → Cu(OH)2(s) + K2SO4(aq) -> ?
2Al(s) + 3Br2(l) → 2AlBr3(s) -> ?
4PBr3(l) → P4(s) + 6Br2(l) -> ?
2C2H6(g) + 7O2(g) → 4CO2(g) + 6H2O(g) -> ?

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?