Which of the following is true for the molecule O=C=S?
A) O=C=S is nonpolar because it contains only double bonds.
B) O=C=S is nonpolar because it is linear.
C) O=C=S is polar because it has a bent shape.
D) O=C=S is polar because the polarities of the O=C and C=S do not cancel.
D
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Use the graphic map scale (in nautical miles [NM]) to estimate the distance from the center of the storm south of Chicago (at 40° N, 90° W) to the east coast of the United States (measure along the 40th parallel).
What will be an ideal response?
________ nautical miles
Short grass prairie is being converted to ________ along 1-70
A) savanna B) desert C) mixed-grass prairie D) woodlands E) tall-grass prairie
The youngest event represented in this block diagram is
A. erosion of a canyon by a river. B. formation of the lowest layer. C. retreat of the seas. D. deposition of the top layer.
Paleoclimatologists use direct measurements
Indicate whether the statement is true or false