Question

for each chemical formula, classify as a pure compound, pure element, or mixture.
substance: nacl(aq), br₂(g), s₈(s), hcl(aq)
classification: mixture, pure element, pure element, mixture

Explanation:

Step1: Analyze NaCl(aq)

An aqueous solution of sodium - chloride (NaCl(aq)) is a mixture because it contains NaCl dissolved in water.

Step2: Analyze Br₂(g)

Bromine gas (Br₂(g)) is a pure element as it consists of only bromine atoms.

Step3: Analyze S₈(s)

Sulfur (S₈(s)) is a pure element as it is made up of only sulfur atoms.

Step4: Analyze HCl(aq)

Hydrochloric acid solution (HCl(aq)) is a mixture as it is a solution of hydrogen chloride in water.

Answer:

NaCl(aq): mixture
Br₂(g): pure element
S₈(s): pure element
HCl(aq): mixture