Question

classify the following as either a substance or a mixture. \table salt\ a substance b mixture c both

Explanation:

Table salt is sodium chloride ($NaCl$). It has a definite composition and distinct chemical properties. A substance has a uniform and definite composition. A mixture has a variable composition. Since table salt has a definite composition (it is a compound, which is a type of substance), it is a substance.

Answer:

A. Substance