How many moles of H2 bonds are broken if you react nitrogen with hydrogen according to the following reaction? N2 + 3H2 ? 2 NH3
A) 6
B) 2
C) 3
D) 1
E) 8
C
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Which of the following statements describes what is required for a forecast to show skill?
A. It must be better than a forecast based on persistence or climatology. B. It must be accurate over more than 90 percent of the forecast area. C. It must be accurate to within 2°C of the predicted temperature. D. It must use the analogue method of forecasting.
What is the natural greenhouse effect? How has it been changed by human activities been changed by human activities?
What will be an ideal response?
Diatoms, important producers in the epipelagic open ocean, are members of the Division ________
A) Angiospermae B) Chrysophyta C) Chlorophyta D) Haptophyta E) Pyrrophyta
The diversity pattern of reef-building coral observed in today's oceans is related to which of the following?
A) Increased nutrients provided by upwelling B) The distance from Earth to the Sun C) The El Nino Southern Oscillation D) The mass extinction that killed the dinosaurs E) The past positions of the continents