Which of the following is necessary for a molecule engage in hydrogen bonding?
A) A hydrogen atom is covalently bonded to a nitrogen atom.
B) A hydrogen atom is covalently bonded to a oxygen atom.
C) Both a and b are correct.
D) Neither a nor b is correct.
C
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Which of the following energy sources has the least environmental impact?
A. wind B. nuclear C. coal D. natural gas
The most common interaction between species is intraspecific competition
Indicate whether the statement is true or false
Unlike fossil fuels, solar energy is considered nonpolluting because the chemical and radioactive products of solar fusion
A) stay near the sun. B) are destroyed in Earth's atmosphere. C) would be produced on Earth anyway. D) quickly break down when they strike the Earth's soil.
What is the primary reason that global energy demand is forecast to increase 40% by 2030?
A) the United States consumption of energy is predicted to increase dramatically B) due to immigration, Europe's consumption of energy will rise C) the further industrialization of developing countries D) Japan's increased energy usage