Which of the following buffers will have the highest pH?
A) a solution containing 0.20 M HC2H3O2 and 0.20 M NaC2H3O2
B) a solution containing 0.25 M HC2H3O2 and 0.15 M NaC2H3O2
C) a solution containing 0.15 M HC2H3O2 and 0.25 M NaC2H3O2
D) They all have the same pH.
C
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If you visited Mount Shasta City (elevation 900 m [3000 ft.]) and found the outside air temperature to be 27°C (81°F),
what would be the air temperature at the summit of Mount Shasta (elevation 4200 m [14,000 ft.]) at that moment—assuming that the temperature conditions with altitude change at an average, or normal, lapse rate? A) 0.2°C (32.0°F) B) 5.9°C (42.5°F) C) -6°C (20.5°F) D) 48.1°C (119.5°F) E) 7.2°C (44.7°F)
What is the difference between an ocean and a sea?
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Radical environmentalists who believe that the environment is sacred and should not be exploited are
A) conservationists. B) preservationists. C) political ecologists. D) cultural ecologists. E) ecological imperialists.
Rainbows are always seen with the Sun:
A) ahead of you. B) behind you. C) to your left. D) 42 degrees above the horizon. E) to your right.