11)B 12)D 13)D 14)A 15)D 16)A 17)A 18)B 19)A 20)B 21)B 22)C
Answer: The answer would be Substrates
Answer:
a glass of muddy water
Explanation:
Pure substances contain only one element or compound.
Calcium is one element so it is a pure substance. Ice and water have the same molecular structure, so it is a pure substance. Aluminum oxide is a chemically pure compound.
The only example that is not a pure substance is muddy water due to the multiple components of mud mixing with the components of water.
Hope that helps.