Name the two products when calcium carbonate (CaCO3) is heated

What is the percentage by mass of silicon (si) in iron aluminum silicate (fe3al2(sio4)3)?

Kc = 0.040 for the system below at 450oc. if a reaction is initiated with 0.40 mole of cl2 and 0.40 mole of pcl3 in a 2.0 liter container, what is the equilibrium concentration of cl2 in the same system? pcl5(g) ⇄ pcl3(g) + cl2(g)

What amount in moles does 242 l of carbon dioxide occupy at 1.32 atm and 20 degrees c?