Which are closer together: the two nuclei within potassium fluoride, KF, or the two nuclei within molecular fluorine, F2?
A) KF
B)
C) Both are the same. Any atom bonded to F will have the same inter-nuclear separation.
D) It makes little sense to compare two molecules which exist in different physical states. KF is a solid while F2 is a gas.
B
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A cap-and-trade program exists for which pollutant?
A. SO2. B. CFCs C. CO2 D. formaldehyde E. lead
Which of the following is an example of recycling?
a. collecting and remelting aluminum beer cans and making them into new cans b. cleaning and refilling soft-drink bottles c. selling used clothing at a garage sale d. saving leftovers in a peanut butter jar e. using household water to water a garden
Meteorologists have grouped air masses into this number of major categories
A) three B) four C) five D) six
Earth's system of winds and pressure cells is a response to the differential heating of Earth's regions by insolation
a. True b. False Indicate whether the statement is true or false