The balanced equation 3 H2(g) + N2(g) ? 2 NH3(g) means which of the following?
A) Three grams of hydrogen react with one gram of nitrogen to form two grams of ammonia.
B) Three moles of hydrogen react with one mole of nitrogen to form two moles of ammonia.
C) The equation means both a and b.
D) The equation means neither a nor b.
B
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Which of the following gives the air temperature at 2000 metres above the ground when the environmental lapse rate is 5°C per 1000 metres and the temperature at the Earth's surface is 25°C?
A. 20°C B. 30°C C. 25°C D. 15°C
The pelycosaurs are the ancestral base for all later reptile groups. Indicate whether the statement is true or false
Of the various elements of weather and climate, changes in air pressure are probably the most easily perceived by people
Indicate whether the statement is true or false
How do the lithosphere and asthenosphere differ?
a. The lithosphere is a cool, rigid outer shell that overlies the asthenosphere, which is softer and weaker than the lithosphere. b. The asthenosphere is a cool, rigid outer shell that overlies the lithosphere, which is softer and weaker than the asthenosphere. c. The lithosphere is a warm, soft outer shell that overlies the asthenosphere, which is more rigid than the lithosphere. d. The asthenosphere is a warm, soft outer shell that overlies the lithosphere, which is more rigid than the asthenosphere. e. The lithosphere is a warm, rigid outer shell that overlies the asthenosphere, which is softer and weaker than the lithosphere. a. The lithosphere is a cool, rigid outer shell that overlies the asthenosphere, which is softer and weaker than the lithosphere.