Question

Pls help with these question because I don't understand what are pure substance and how to tell ​

Answer 1

Answer:

i am pretty sure its A

Explanation:

they are etheir together like black and white or some sort of pattern if notice.

If they are like B,C,D like that they are mixtures which are NOT PURE SUBSTANCE'S.

Answer 2

Answer:

option A is your answer.

Explanation:

Reason being is because that for the diagram if all of the little dots are connected another single dot then it is a pure but if one little dot isn't connected to another one then it isn't a pure substance.

Hope this helps!!!