The only two layers of Earth's atmosphere that have temperature gradients that allow convection to take place are
a. the troposphere and the thermosphere.
b. the mesosphere and the stratosphere.
c. the thermosphere and the stratosphere.
d. the troposphere and the mesosphere.
e. the troposphere and the stratosphere.
d. the troposphere and the mesosphere.
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Element A, mass 10.00 g, reacts exactly with 2.00 g of element B to form 12.00 g of compound AB. If 5.00 g of element A is reacted with 2.00 g of element B to form the same compound, what mass of compound AB will be formed?
a. 7.00 g b. 6.00 g c. 17.00 g d. 12.00 g
Find Brewster's angle for light reflected from the top of a water surface (n = 1.33 )
A) 53.1° B) 36.9° C) 56.3° D) 60.2° E) 90.0°
In a given period, the element of which group has the highest ionization energy?
a. 2A b. 8A c. 7A d. 1A
Graphical Analysis: Which of the following graphs represent an object at rest? (There could be more than one correct choice.)
A. graph a B. graph b C. graph c D. graph d E. graph e