Pre-lab quiz for chem 243b

Quiz #1
Attempt 1
Written: Jul 7, 2012 9:48 AM - Jul 7, 2012 9:50 AM
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Question 1 1 / 1 point
At what time do you have to complete your online prelab assignment to be allowed to participate in the lab?
Question options: A week before the lab Day before the lab at 10 pm The morning of lab day at 8 am One hour before the lab
Question 2 1 / 1 point
Which materials/chemicals belong in the desiccator?
Question options: Drying agents such as anhydrous magnesium sulfate silicagel 1 M NaOH aqueous standard solution aqueous extract of your reaction alumina for chromatography
Question 3 1 / 1 point
Vacuum tubing is the thick-walled black tubing, not the skinny tygon tubing.
Question options: True False
Question 4 1 / 1 point
Match the letters to the safety equipment. (You have to enter numbers 1-6 as answers)

__3__ C
__4__ D
__6__ F
__2__ B
__5__ E
__1__ A
1. fire extinguisher
2. glass waste box
3. trash can for regular waste
4. safety shower
5. eyewash station
6. dustpan and broom

Attempt Score: 4 / 4 (100.00 %)
Overall Grade (highest attempt): 4 / 4 (100.00 %)
Quiz #1 (3)NMRQuestion 1 1 / 1 point
Equivalent protons in a molecule will result in one NMR signal. How many NMR signals would you predict for each of the following molecules?
__1__ benzene
__2__ 3-pentanone
__4__ toluene
__3__ ethanol
__2__ t-butyl methyl ether
1. 1
2. 2
3. 3
4. 4
Question 2 1 / 1 point
A compound to be analyzed by NMR should be dissolved in a solvent. Clearly the solvent should not have an NMR signal in the spectral area you are trying to analyze. Which solvents are appropriate for use in proton NMR?
Question options: Benzene-d6 Chloroform Carbon tetrachloride Water Heavy water (deuterium oxide) Acetone-d6 Chloroform-d (deuterated chloroform)
View FeedbackQuestion 3 1 / 1 point

How many different signals can you observe in the NMR spectrum of