Each chemical element has a standardized chemical symbol, not a formula.
H2O. It is the formula of water.
Bromine atom= [Br]
The chemical formula for one carbon atom combined with one oxygen atom is CO.
Copper oxide is composed of two elements: copper and oxygen. Copper oxide has a chemical formula of CuO, indicating that it consists of one copper atom and one oxygen atom.
No subscripts mean only one atom in formula. Example: KCl - 1 atom of potassium, 1 atom of chlorine.
Well, you didn't indicate the atom so I'll do what I can. The formula for acetic acid is CH3COOH. If the indicated letter in the formula is C, the atom is carbon. If the indicated letter in the formula is H, the atom is hydrogen. If the indicated letter in the formula is O, the atom is hydrogen.
The chemical formula for sodium hypochlorite is NaOCl, consisting of one sodium atom, one oxygen atom, and one chlorine atom.
You can "figure out" by checking the periodic table :D
The formula for gold phosphide is AuP. It consists of one gold (Au) atom and one phosphorus (P) atom.
The formula for stannous oxide is SnO. It is composed of one tin (Sn) atom and one oxygen (O) atom.
The chemical formula for sulfur monochloride is SCl. It is composed of one sulfur atom and one chlorine atom.
There is one atom of carbon in this formula. The formula indicates one atom of Copper + one atom of Carbon + 3 atoms of oxygen. O3 added to any compound prompts the suffix -ate, so in this case, you have a formula for Copper Carbonate.