Ra, Rn, Po
4, 6, 8
3.33 m2, 3 m2
column A is mostly pure substances and column B is mostly mixtures
column A is mostly mixtures and column B is mostly pure substances
Which substances are in the wrong column?
milk, graphite, raisin bran, gold
Flask A, Flask B
NH3+ and CO2H, NH3+ and CO2-, NH2 and CO2H, NH2 and CO2-
-11, 3, 11, 13
amide, amine, alcohol
ester, amide, ether
ester, amine, ether
carboxylic acid, amide, alcohol
How many hydrogens are present in the structure?
8, 9, 10, 11
A, B, C
A, B, C
A. Uniformly coated with a polar film
B. Uniformly coated with a nonpolar film
C. Coated with a film that gradually increased in polarity from the bottom of the slide to the top
D. Coated with a film that gradually decreased in polarity from the bottom of the slide to the top
(Adapted from M. K. Chaudhury and G. M. Whitesides, Science, 256, 1539 (1992).)
227. Take a square refrigerator magnet and cut off a thin strip from both the horizontal and vertical edges. Place one of the thin magnetic strips on the back of the large magnet as shown below and pull gently vertically and then horizontally. Now try the other magnetic strip.
Which is the best representation of the magnetic field of the large magnet, where N represents the north pole and S the south pole?
A, B, C
230. Ibuprofen is an anti-inflammatory drug also used as an aspirin substitute.
To what family of organic compounds does ibuprofen belong?
What alkyl group is attached to the para position of the benzene ring of the ibuprofen molecule?
Identify the functional groups:
A. ester or amide
B. primary, secondary, tertiary amine
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