Chemistry, 31.12.2019 05:31 alonzob2367
Astudent was given two clear liquids; a colorless liquid and a dark-blue liquid. the student was asked to combine the liquids in a beaker and record observations. which of the following results, if true, would provide the best evidence that a chemical change took place when the liquids were combined?
a. have combined to produce a new substance.
b. were pure substances before they were mixed.
c. are toxic and should be handled with extreme caution.
d. have been stored too long and are no longer good.
Answers: 1
Chemistry, 21.06.2019 15:20
Both 1,2−dihydronaphthalene and 1,4−dihydronaphthalene may be selectively hydrogenated to 1,2,3,4−tetrahydronaphthalene. one of these isomers has a heat of hydrogenation of 101 kj/mol (24.1 kcal/mol), and the heat of hydrogenation of the other is 113 kj/mol (27.1 kcal/mol). match the heat of hydrogenation with the appropriate dihydronaphthalene.
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Chemistry, 22.06.2019 19:30
Acetylene gas c2h2 undergoes combustion to produce carbon dioxide and water vapor how many grams of water are produced by the same amount of c2h2?
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Chemistry, 22.06.2019 23:00
What is the oxidation state of each individual carbon atom in c2o42−?
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Chemistry, 23.06.2019 03:30
If you need to add 27.50ml of a solution, which piece of glassware would you use to deliver this volume and explain how you would determine if the 27.50 ml was measured?
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Astudent was given two clear liquids; a colorless liquid and a dark-blue liquid. the student was as...
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