The most common gold compounds are auric chloride (AuCl3) and chlorauric acid (HAuCl4). A mixture of one part nitric acid with three of hydrochloric acid is called aqua regia (because it dissolved gold, the King of Metals). It is unaffected by air and most reagents.
ang hirap naman yan gusto ko sanang sagutin pero ang rami at ang hirap naman sorry
because water consists of two or more atoms while hydrogen and oxygen consists only one atom...that's all i know