Question

What is one characteristic of a sample of matter that indicates it is a pure substance?

a.it can be separated using by a physical means, such as filtering.
b.the components in a pure substance do not have to be in definite ratios.
c.if the composition of a sample varies, the sample is a pure substance.
d.if the composition of a sample is fixed, the sample is a pure substance?

Answer 1

The correct answer is option d.

Step-by-step explanation:

Pure substance is defined as a matter with definite and constant composition.They following properties

• They have unique chemical properties.
• They made up of either one type of atom or one type of molecule.
• There composition doesn't vary.

The correct option in agree,net with above stated properties of pure substance is option d.