A student has equal-volume samples of three gases. All the gases are at the same temperature and pressure. If the three gases are O2, CO2, NH3, which sample contains the largest number of molecules?
A) O2
B) CO2
C) NH3
D) None, they all contain the same number of molecules.
D
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The most important reason why summers in the Southern Hemisphere are not warmer than summers in the Northern Hemisphere is that
a. ?Earth is closer to the Sun in January. b. ?Earth is farther from the Sun in July. c. ?over 80 percent of the Southern Hemisphere is covered with water. d. ?the Sun's energy is less intense in the Southern Hemisphere. e. ?ice from Antarctica prevents it from getting very hot.
Eluviation occurs due to ____
a. hygroscopic water b. gravitational water c. capillary water d. soil air e. humus
Explain the process of accretionary wedge
What will be an ideal response?
Which of the following is a consequence of clearing forests for agriculture purposes?
A) Soil erosion is increased. B) Biodiversity is increased. C) Crop productivity is greatly increased because of the rich soil. D) Water runoff is decreased. E) CO2 levels remain appropriate within the atmosphere.