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Compare and contrast physical changes with chemical changes.
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Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?
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Which of the following describes qualitative data? a) recording the temperature of a solid as it is warmed. b) noting the color of a solution as it is heated. c) measuring the volume of an object by water displacement. d) taking the mass of an object using a balance.
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Chemistry, 23.06.2019 14:00
Beaker a contains 100 ml of 1.5 mammonia. beaker b contains 100 ml of 0.50m ammonia. how does the solution in beaker a compare to the solution in beaker b?
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What does HR mean? In the context of N2O4⇔2NO2, HR=-14...
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