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Do certain types of chemical reactions tend to be endothermic? why?
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Air can be considered a mixture. which statement does not explain why?
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The independent variable in an experiment will be the variable that you o a) change ob) hold constant ng c) observe for changes
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An unknown substance is a white solid at room temperature and has a melting point of 78 °c. which of the following substances is most likely to be the identity of the unknown sample?
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Do certain types of chemical reactions tend to be endothermic? why?...
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