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Chemistry 8 Online
OpenStudy (anonymous):

Terry heats two different masses of substance A to different temperatures. Which of the following is true about this experiment? A. This experiment is uncontrolled because two gaseous products are measured. B. This experiment is well controlled because only the mass of substance A is valid. C. This experiment is uncontrolled because two different masses of substance A are used. D. This experiment is well controlled because the masses of substance and the products are varied.

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