Question

1. true or false: the chemical properties of the starting substances change when a mixture is made.

a. true
b. false

Explanation:

A mixture is a combination of two or more substances where each substance retains its own chemical properties. For example, when you mix salt (NaCl) and sand (SiO₂), the salt still has the chemical properties of NaCl (like solubility in water) and sand has the chemical properties of SiO₂ (like insolubility in water). There is no chemical reaction occurring during the formation of a mixture that would change the chemical nature of the starting substances.

Answer:

B. False