When a nonmetal oxide reacts with water, it forms an oxoacid with the same oxidation number as the nonmetal. Give the name and formula of the oxide used to prepare each of these oxoacids:
(h) nitrous acid;

An oxyacid, oxoacid, or ternary acid is an acid that contains oxygen. Specifically, it is a compound that contains hydrogen, oxygen, and at least one other element, with at least one hydrogen atom bonded to oxygen that can dissociate to produce the H+ cation and the anion of the acid.

Nitrous acid is obtained by the action of dilute HCl or H2SO4 on any nitrite. Nitrous acid is obtained when di-nitrogen tri-Oxide is dissolved in cold water. HNO2 is obtained by the action of barium nitrite and cold and dilute H2SO4. This reaction is used in the laboratory method of making nitrous acid.

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When a nonmetal oxide reacts with water, it forms an oxoacid with the same oxidation number as the nonmetal. Give the name and formula of the oxide used to prepare each of these oxoacids: (h) nitrous acid;

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When a nonmetal oxide reacts with water, it forms an oxoacid with the same oxidation number as the nonmetal. Give the name and formula of the oxide used to prepare each of these oxoacids:
(h) nitrous acid;