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you observe a container in which you have just combined two substances. give 7 évidences you you could observe that indicate a chemical change
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Which type of bond is present in hydrogen sulfide (h2s)? the table of electronegativities is given. a. hydrogen b. ionic c. nonpolar covalent d. polar covalent
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Compare and contrast physical changes with chemical changes.
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If 22.5 of nitrogen at 748 mm hg are compressed to 725 mm hg at constant temperature. what is the new volume?
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you observe a container in which you have just combined two substances. give 7 évidences you you cou...
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