A typical deposit of cholesterol, C27H46O, in an artery has a mass of 3.90 mg. How many molecules of cholesterol are present in this deposit?
A) 6.07 x 10^21
B) 6.07 x 10^18
C) 0.00390
D) 1.65 x 10^-22
B
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Most plants do best in soils with a pH that is
A) below 2. B) between 6 and 8. C) between 8 and 10. D) above 10.
A change in the frequency of a sound, light, or other wave caused by movement of the wave's source relative to the observer is known as the _______________
Fill in the blank(s) with correct word
In comparison to developing countries, catastrophic natural disasters in developed countries are most likely to cause ____.?
a. ?more economic damage, but less loss of life b. ?less economic damage, but more loss of life c. ?equal amounts of economic damage and loss of life d. ?very little economic damage or loss of life e. ?an unpredictable mix of economic damage and loss of life
Currently, approximately what percentage of renewable energy consumption is represented by solar power in the world?
A) 50% B) 5% C) 2% D) 20% E) 10%