Question

genius tip! to remember chemical formulas of nitrites, nitrates, and ammonium, count the number of ______________ in each word. thats the same number you would use in their chemical formulas. mushrooms oxygen molecules vowels rewatch

Explanation:

The chemical formulas of nitrites ($NO_{2}^{-}$), nitrates ($NO_{3}^{-}$) and ammonium ($NH_{4}^{+}$) can be related to the number of vowels in their names. Nitrites has 2 vowels, nitrates has 3 vowels and ammonium has 4 vowels which corresponds to the number of oxygen atoms in nitrites and nitrates and the number of hydrogen - like entities (in a sense) in ammonium for a simple mnemonic.

Answer:

vowels