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Chemistry, 24.12.2019 20:31, sierra6816
Compare and contrast physical and chemical changes in matter. give an example of each type of change.
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Answers: 3
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Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.
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Chemistry, 22.06.2019 17:30, llamasking
Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)
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Compare and contrast physical and chemical changes in matter. give an example of each type of change...
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