How many different ketones have the molecular formula C5H10O?
A) 1
B) 2
C) 3
D) 4
C
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The atomic number of an element equals the number of ________ in each atom.
A. electrons B. protons C. neutrons D. Answers neutrons and protons are both correct; answer electrons is not correct. E. Answers electrons, neutrons and protons are all correct.
Niagara Falls is the most famous set of falls in North America because they ________
A) are the widest falls in the word B) are the tallest falls in the world C) pass an enormous volume of water over them D) flow "backwards" from what would be expected E) date from almost the beginning of Earth history
Which nation in East Africa has disintegrated into an ungovernable territory ruled by clans, warlords and militias?
A) Somalia B) Djibouti C) Ethiopia D) Kenya E) Eritrea
The principle that states that an igneous intrusion or a fault is younger than the rocks that it intrudes or
cuts is the principle of: a. cross-cutting relationships. b. inclusions. c. fossil succession. d. uniformitarianism. e. superposition.