Forces have both magnitude and direction
Indicate whether the statement is true or false
True
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Man-made chemicals such as CFCs can exhibit ________ times more greenhouse potential than carbon dioxide.
A. 200 to 2000 B. 0.24 to 0.53 C. 12000 to 15000 D. 10 to 50
Which of the following are characteristics of the "world economy"?
A) It is a multistate economic system. B) It was created in the late 15th and early 16th centuries. C) It includes a core of dominant countries. D) It is based on capitalism. E) all of the above
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 atoms?
A) O2 B) CO2 C) NH3 D) None, they all contain the same number of atoms.
The pKa of lactic acid is 3.86. What is the pH of a buffer in which the lactic acid concentration is 2.0 M and the sodium lactate concentration is 0.50 M?
A) 2.86 B) 3.26 C) 4.46 D) 4.86