Appl Of Ms Excel In Analytical Chemistry
2nd Edition
ISBN: 9781285686691
Author: Crouch
Publisher: Cengage
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Physical Chemistry : Perfect Gases
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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?
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Using the balanced equation from Question #8, how many grams of lead will be produced if 2.54 grams ofPbS is burned with 1.88 g of O2? Express your answer to the correct number of significant figures and youmust show all work in the form of dimensional analysis as shown in Lesson 4. (Hint: be sure to work theproblem with both PbS and O2).
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