Write a net ionic equation to show that nitrous acid behaves as a brønsted-lowry acid in water.

Explanation:

According to Bronsted-Lowry an acid is defined as the specie which is able to donate hydrogen ions when dissolved in water.

For example,

Chemical formula of nitrous acid is . Since, it donates a hydrogen ion in water hence, it acts as a Bronsted-Lowry acid.

On the other hand, bases are the species which are able to accept hydrogen ions when dissolved in water.

For example,

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.