Question

which substance has a lower concentration of hydrogen ions than ammonia? coffee liquid drain cleaner baking soda

Explanation:

Hydrogen ion concentration is inversely related to pH (higher pH = lower H⁺). Ammonia is a weak base (pH ~11). Coffee is acidic (pH ~5, higher H⁺ than ammonia). Baking soda is a weak base (pH ~8.3, higher H⁺ than ammonia). Liquid drain cleaner is a strong base (pH ~14, lower H⁺ than ammonia). Thus, it has the lowest H⁺ concentration among the options.

Answer:

liquid drain cleaner