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Compare and contrast physical changes with chemical changes.
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Chemistry, 22.06.2019 12:00
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, 22.06.2019 15:00
What is the most important factor in determining climates.
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Balancing equation c2h6+o2> co2+h2o...
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