When comparing the strength of two weak acids which factor(s) do we use to determine which is the stronger of the two?
A) the size of the acid dissociation constants
B) the values of the pKa's of the acids
C) either a or b
D) neither a nor b
C
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Direct proof of continental drift was made possible with measurements of _____ with _____.
A ) altitude, lasers B ) location, sextants and chronographs C ) location, global positioning systems [GPS] D ) altitude, global positioning systems [GPS]
The cloudiest city in the U.S. is:
A) Lansing, Michigan. B) Chicago, Illinois. C) Juneau, Alaska. D) San Francisco, California.
What makes up an ecosystem?
A) energy and matter and the organisms competing for resources in the ecosystem B) living and nonliving parts and energy movement created by the sun C) energy and matter and the organisms functioning apart D) living and nonliving parts and the processes that disconnect them E) living and nonliving parts and the processes that connect them
In humid Iowa, where summer nighttime temperatures are high, corn takes ____ time to mature than in the drier west
a. the same amount of b. twice as much c. a quarter of the d. more e. less