Question

Which of these statements best describes the relationship between matter, pure substances, and mixtures?

A. Pure substances can be divided into two groups; matter and mixtures.
B. Matter can be divided into two groups; pure substances and mixtures.
C. Mixtures and matter are two of many different types of pure substances.
D. Pure substances and matter are two of many different types of mixtures.

Answer 1

B is correct because Matter is everything that exists. A pure substance cannot be a mixture because pure substances are pure. Same goes for a mixture. But matter includes both mixtures and pure substances.
Hope it helps!
-DunFlowers

Answer 2

The answer is: B. Matter can be divided into two groups; pure substances and mixtures.

Pure substance is made of only one type of atom or only one type of molecule, it has definite and constant composition with distinct chemical properties.

For example, aluminium is an element and ammonia is compound.

Mixtures are physical combinations of pure substances that have no definite or constant composition.