Write the chemical formula for each substance mentioned in the following word descriptions (use the front inside cover to find the symbols for the elements you don't know).
(a) Zinc carbonate can be heated to form zinc oxide and carbon dioxide.
(b) On treatment with hydrofluoric acid, silicon dioxide forms silicon tetrafluoride and water.
(c) Sulfur dioxide reacts with water to form sulfurous acid.
(d) The substance phosphorus trihydride, commonly called phosphine, is a toxic gas.
(e) Perchloric acid reacts with cadmium to form cadmium(II) perchlorate.
(f) Vanadium(III) bromide is a colored solid.