Write balanced chemical equations for each of the following reactions omitting (where relevant) all spectator species
(please explain for me how u get the answer, im new in chemistry and its very hard for me)
a) Lead(II) nitrate solution is mixed with sodium iodide solution producing a bright yellow precipitate
b) Potassium carbonate solution reacts with hydrochloric acid solution producing a colourless gas
c) Acetone (C3H6O) burns with oxygen producing carbon dioxide and water only
d) Solid calcium nitrite is decomposed by heating, producing calcium oxide, nitrogen monoxide and nitrogen dioxide