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20 December, 09:28

Which statement is true of a chemical change?

A) It involves changes in the molecular structure.

B) It involves changes in phase but not changes in the molecular structure.

C) It involves dissolving one substance into another.

D) It involves a change in the state, or phase, of a substance.

E) It involves the process of separating two or more dissolved substances.

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Answers (2)
  1. 20 December, 11:16
    0
    The appropriate answer is a. it involves a change in the molecular structure of the substance. A change in phase or state is referred to as a physical change. For example ... liquid water freezing is a physical change because the state changes but solid water is still H20. Separating water into its constituent atoms, hydrogen and oxygen is a chemical change because the molecular structure of water is now non existent.
  2. 20 December, 11:40
    0
    The answer is c. There wouldnt be a process or a change to it
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