1. Distinguish between a mixture and a pure substance. ​

Mixture - A mixture is a substance which consist of two or more elements or compounds not chemically combined together.

Pure Substance - A pure substance is a substance which has only one type of atoms or molecules thereby having a constant composition and structure.

1)Mixture is the combination of substance

2)There are two types of mixture such as heterogeneous mixture and homogeneous mixture

3)foreg=Salt solution ,sedimentation

Pure substance

1)Pure substances are also called elements

2)They are made up of small atoms

3)for eg= oxygen,Venadium ,Iron,Oxygen

the answer is

answer: a chemical reaction

explanation:

im not wrong