Which of the following molecules would you expect to be the least attracted to a Na+ ion?
A) H-F
B) H3C-CH3
C) Cl2CH2
D) F-
E) HO-
Answer: B
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Engines, including car engines, are rated in horsepower. What is horsepower?
(a) The force needed to start the engine. (b) The force needed to keep the engine running at a steady rate. (c) The energy the engine needs to obtain from gasoline or some other source. (d) The rate at which the engine can do work. (e) The amount of work the engine can perform
At the Mars Pathfinder landing site, the surrounding rocks are scattered and stacked against each other. This suggests that the spacecraft landed in
A) an area of explosive volcanic activity B) an ancient floodplain C) an area subjected to wind erosion D) the debris from a giant impact
What are the mass number and the atomic number for each of the following:
(a) beta+? (b) beta-?
Which of the following increases the internal energy of a solid metal rod?
a. raising it to a greater height c. having the rod conduct heat b. throwing it through the air d. having the rod absorb heat