Question

missed this? watch practice what is the formula for hydrofluoric acid? hfo₃ hf hfo₄ hfo

Explanation:

Hydrofluoric acid is a binary acid (composed of hydrogen and a non - metal). For binary acids, the naming convention is "hydro - " + non - metal root + " - ic acid", and the formula is formed by the hydrogen ion ($H^+$) and the anion of the non - metal. Fluorine (F) forms the fluoride ion ($F^-$). So the formula for hydrofluoric acid is $HF$ (since $H^+$ and $F^-$ combine in a 1:1 ratio to form a neutral compound). The other options: $HFO_3$, $HFO_4$, and $HFO$ do not follow the formula formation rules for hydrofluoric acid.

Answer:

B. HF