Write the formulas for the following compounds: (a) rubidium nitrite, (b) potassium sulfide, (c) sodium hydrogen sulfide, (d) magnesium phosphate, (e) calcium hydrogen phosphate, (f) lead(ll) carbonate, (g) tin(ll) fluoride, (h)ammonium sulfate, (i) silver perchlorate, (j) boron trichloride.