Which situation provides the best evidence that a chemical reaction is taking place?
A).A chemical completely dissolves in water and the temperature of the solution remains constant
B).A metal strip bends when heat
C).Two solutions mixed produce a solid
D).A solution freezes in the freezer
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Acar's position in relation to time is plotted on the graph. what is the car's average velocity for segment c? a) -4 m/s b) -0.25 m/s c) 0.25 m/s d) 4 m/s
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Which situation provides the best evidence that a chemical reaction is taking place?
A).A chemical...
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