Which formulas and their respective names do not match? i) bao barium hydroxide ii) ccl4 carbon tetrachloride iii) n2o4 dinitrogen tetroxide iv) hf monohydrogen monofluoride a) i and ii b) ii and iii eliminate c) i and iv reactivate d) i, iii and iv

The correct answer is C because has the chemical name barium oxide, the hydroxide part is only when we have an ion attached to the metal. HF is called hydrogen fluoride as opposed to the mono hydrogen mono fluoride. The exceptions in nomenclature for covalent compounds is to never use mono for the first element of a covalent compound and never to use a prefix for a hydrogen containing compound.

wavelegth as in spectrum red oygbiv