Which of the following is not a name of a valid chemical formula? hydrobromic acid ammonium nitrate aluminum (iii) chloride copper (ii) oxide

Answer is: aluminum (III) chloride.

Aluminum (III) chloride is not valid, because aluminium has oxidation number +3 in compounds, so (III) is excess in this name.

The right name for AlCl₃ is aluminium chloride.

Hydrobromic acid, ammonium nitrate (NH₄NO₃) and copper(II) oxide are correct names.

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.