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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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Identify the lewis base in this balanced equation: fe3+ h2o fe(h2o)63+
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Which type of protein stayed only on the surface of the plasma membrane a. peripheral b. transmemb...
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