Sodium azide (nan3) is a substance that can be used to inflate airbags. an electrical impulse causes the sodium azide to decompose, producing elemental sodium and nitrogen gas. write the balanced chemical equation for this reaction.

NaN₃(s) → Na(l) + N₂(g).

Explanation:

NaN₃(s) → Na(l) + N₂(g).

It is clear that 1.0 mole of NaN₃(s) is decomposed to produce 1.0 mole of Na(l) and 1.0 mole of N₂(g).

2NaN3(s) →2Na (s) + 3N2(g)

Explanation: The equation above follows law of conservation of mass. The number of atoms of each element on each side of a chemical equation must be equal.

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.