Help me with this science question on the middle one..
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What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?
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Chemistry, 22.06.2019 16:50
Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.
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Chemistry, 22.06.2019 19:50
Identify the lewis base in this balanced equation: fe3+ h2o fe(h2o)63+
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