Which of the following are produced when formic anhydride reacts with ethanol?
A) acetic acid and ethyl formate
B) acetic acid and methyl formate
C) formic acid and methyl formate
D) formic acid and ethyl formate
D
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Why is the extraction of wind so effective over or near the ocean?
a. There are large gusts of wind. b. The wind tends to be steady in these areas. c. Windmills can be easily constructed on platforms. d. There is more stress on the gears to generate more energy.
The Jewish calendar is based on the ________ cycle and must add an extra ________ periodically to keep in step with the agricultural calendar
A) solar, month B) solar, day C) lunar, month D) lunar, year E) agricultural cycle, week
If the concentration of a gas in the surface layer of seawater is greater than the saturation solubility
Desert and tundra both ________
A) have permafrost deep underground B) lack shrubs C) lack insects D) have rich soils, although the climate is such that very little grows E) have relatively low precipitation