INTRODUCTORY CHEMISTRY-W/MOD.MASTERING.
INTRODUCTORY CHEMISTRY-W/MOD.MASTERING.
6th Edition
ISBN: 9780134809922
Author: Tro
Publisher: PEARSON
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Chapter 1, Problem 24QGW

How curious are you? How good are your quantitative skills? How hard are you willing to work to succeed in chemistry? Answer these questions individually on a scale of 1 (= not at all) To 5 (= very), then share your answers with your group. Report the group average for each question.

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The mass of magnesium used in this experiment is critical to determining the moles of hydrogen gas generated. The analytical balances used in Chemistry 1A labs are very sensitive to point that touching materials with your fingers before measuring them can affect the measurements. The balances are sensitive enough to detect dirt and oils from your fingers transferred to the magnesium. Would your experimental value of R increase or decrease if the mass of magnesium measured was artificially high due the touching it with your hands? Increase Decrease
What are replicates in Analytical Chemistry? O The component of a sample that repeats over different assays. Similar assays done to different samples A sample that contains exactly the same amount of analytes than the original sample similar samples that are analyzed at the same time and in the same way
Acetic acid percentages in five vinegar samples were 4.98, 4.86, 4.97, 4.99. 5.08, 5.11, 4.97, 5.32 and 4.89. Could we reject any of these values ​​with 95% confidence? Q critical = experimental Q = Therefore (yes or no) the suspicious data can be rejected (write the value of the data that can be deleted, example 5.08).

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