Barium ions carry a 2+ charge, and nitrogen ions carry a 3- charge. What would be the chemical formula for the ionic compound barium nitride?
A) Ba3N2
B) Ba2N3
C) Ba3N4
D) Ba2N2
A
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____________________ are broad and diffuse areas of pollution that are difficult to identify and control.
Fill in the blank(s) with the appropriate word(s).
Which of the following is the most common cause of river and stream flooding?
A) The onset of cold weather B) Failure of levees C) Intense precipitation D) Overgrazing E) Global warming
At a transform plate boundary, the two plates move:
a. laterally past each other. b. under and/or over each other. c. towards each other. d. away from each other. e. perpendicular to the length of the plate boundary.
At what point is the vapor pressure of a liquid measured?
A) When molecules escape from the liquid more rapidly than they are recaptured by the liquid. B) When molecules are recaptured by the liquid more rapidly than they escape from the liquid. C) When molecules escape and are recaptured at the same rate. D) When the liquid has been totally converted to vapor.