Candace has two diagrams of particles of substance a and substance b as shown below. she is classifying them as either pure substances or mixtures. in her conclusion, she stated, "both substances are mixtures, because they are made up of different types of elements." is candace correct? why or why not? candace is correct. both substances are mixtures. mixtures are any substances made up of two or more different types of elements. candace is incorrect. substance a is a pure substances, because it is a compound. a compound is made up of two or more different elements. a mixture is made up of different molecules not bonded together. candace is correct. both substances are mixtures, because they both contain different types of molecules. candace is incorrect. substance b is a pure substance, because it is made up of molecules of only one type of element. substance a is a mixture, because each molecule has different elements.