The D-form of which of the following amino sugars is not commonly found naturally?
A) galactosamine
B) glucosamine
C) mannosamine
D) ribosamine
D
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What percentage of the 25 key nonrenewable mineral resources must the US import?
A. All or nearly all B. Little to none C. 1/4 to 1/2 D. 1/2 to 3/4
With no air resistance, what is the maximum speed of a horizontally moving tennis ball as it clears the 1.25 m net and lands within the edge of the court, 12.0 m from the bottom of the net?
A. 12.0 m/s B. 16.0 m/s C. 48.0 m/s D. 24.0 m/s
A student gave the name of a compound as 2,2-diethylpentane. Although this correctly represented the connectivity of the compound, it was not a valid IUPAC name. What is the correct IUPAC name for this compound?
A) 3-ethyl-3-methylhexane B) 3-methyl-3-propylpentane C) 2-ethyl-2-propylbutane D) 4,4-diethylpentane
Approximately 40 grams of the radioisotope iodine-131 were accidentally released into the atmosphere during the Fukushima nuclear accident. The half-life of iodine-131 is 8 days. How long would it take for there to be 10 grams of iodine-131 left in the
environment? A) 8 days B) 12 days C) 14 days D) 16 days E) 23.7 days