these must be separated chemically. mixtures ...
these must be separated chemically. mixtures elements compounds homogeneous mixtures
Answer
# Brief Explanations:
Compounds are substances made up of two or more different elements chemically combined. They can only be separated into their constituent elements by chemical means. Mixtures (both homogeneous and heterogeneous) can be separated by physical methods. Elements are the simplest form of matter and cannot be broken down further by chemical means.
# Answer:
C. compounds