The mass of the solution totals 20 grams.   C. The temperature of the solution is 350 C.   D.

Chemistry In Focus
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Chapter1: Molecular Reasons
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Problem 22E: Classify each of the following as a law or a theory: a. In a chemical reaction, energy is neither...
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A student added 5 grams of calcium chloride, a white solid substance, to 15 grams of water at 220 C.  Several observations were made and the student inferred that a chemical reaction occurred.

 

Which observation best supports the student's inference that a chemical reaction occurred?

  •  
    A.

    The calcium chloride dissolved in the solution.

  •  
    B.

    The mass of the solution totals 20 grams.

  •  
    C.

    The temperature of the solution is 350 C.

  •  
    D.

    The solution became lighter in color.

     

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