Question

substance classification hcl(aq) select nano₃(aq) pure compound p₄(s) pure element mixture n₂(l) select

Explanation:

Step1: Analyze HCl(aq)

HCl in aqueous solution is a mixture as it contains HCl dissolved in water.

Step2: Analyze NaNO₃(aq)

NaNO₃ in aqueous solution is a mixture since it is NaNO₃ dissolved in water.

Step3: Analyze P₄(s)

P₄ is a pure element as it consists of only phosphorus atoms.

Step4: Analyze N₂(l)

N₂ is a pure element as it is made up of only nitrogen molecules.

Answer:

HCl(aq): mixture
NaNO₃(aq): mixture
P₄(s): pure element
N₂(l): pure element