Chapter1: Molecular Reasons
Section: Chapter Questions
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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Question
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
Which observation best supports the student's inference that a chemical reaction occurred?
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A.
The calcium chloride dissolved in the solution.
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B.
The mass of the solution totals 20 grams.
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C.
The temperature of the solution is 350 C.
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D.
The solution became lighter in color.
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