Write formulas for the following compounds consisting of two non-metals or a metalloid and a non-metal.
(1)- hydrochloric acid
(2) hydro-sulfuric acid
(3)-hydro-iodic acid
(4)- silicon tetrafluoride
(5)-arsenic penta-fluoride
(6)-xenon hexafluoride
(7)-iodine penta-fluoride
(8)-krypton difluoride
(9)-tetra-sulfur tetra-nitride
(10)-dichlorine hepta-oxide
(11)-phosphorus trihydride (phosphine)
(12)- tetra-phosphorus decoxide