Chemistry, 20.10.2020 20:01, Animallover100
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Chemistry, 22.06.2019 12:00, sophiaa23
Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.
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Chemistry, 23.06.2019 02:30, babbity2009
Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!
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