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Chemistry, 31.01.2020 19:49 rafamoreura
Which of the following represents a chemical change to matter? . a. digestion of food. b. melting an ice cube. c. shredding paper. d. crushing an ice cube
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Chemistry, 22.06.2019 13:00
Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.
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Which of the following represents a chemical change to matter? . a. digestion of food. b. melting an...
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