Question

What makes a pure substance different from a heterogeneous mixture?

Answer 1

Answer:

D.) The components of a pure substance are single elements or compounds instead of a mixture of compounds.

Explanation:

A pure substance is made up of the same type of atoms. An example of a pure substance is an element, which is made up of the same atoms. Gold element is made up of all gold atoms.  

A heterogeneous mixture contains two or more components and each component may or may not be in a different phase. Such in a bowl of salad the lettuce is solid and the dressing is a liquid, so a salad is a heterogeneous mixture.  

Answer 2

Definitely the answer is d