Which releases h+ cations when place in water? a) ch_4 b) nahc0_3 c) hci d) co_2

C) hydrochloric acid and, in case that the question allows for more than one choices, D) carbon dioxide as well.

Methane molecules are nonpolar and barely dissolve in water.

Sodium hydrocarbonate undergoes hydrolysis to release hydroxide ions that can end up consuming :

Hydrochloric acid, a strong acid, ionizes to produce protons and chloride ions when dissolved in water:

Carbon dioxide reacts with water to produce hydrocarbonic acid, a weak acid that slightly ionizes, also producing protons but to a significantly lesser extent than hydrochloric acid does.

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

explanation:

0.07 g/cm³

1.37 g/cm³