Can hydrobromic acid be a valid chemical formula?

Question

anonymous · Answer

Definitely, why can't it not be? You can write it as HBr. 
H-Hydrogen
Br-Bromine

anonymous · Answer

am confunsed bacause they are asking me Which of the following is not a name of a valid chemical formula?

 hydrobromic acid

 ammonium nitrate

 aluminum (III) chloride

 copper (II) oxide
and all of them seem to be valid xD! HEHE

anonymous · Answer

Well, if you were to write out all the formulas:

Hydrobromic Acid -- HBr
Ammonium Nitrate -- NH4NO3
Copper (II) Oxide - CuO

I am guessing that the answer would be Aluminum (III) Chloride. Al only has one charge (+3), it seems redundant to state that it's III.

anonymous · Answer

oh right I forgot to looks at the charge of Aluminum hhehe thanks!