In naming compounds, the prefix is used to
A) indicate the level of toxicity.
B) categorize the compound.
C) indicate the relative number of atoms.
D) indicate the relative number of molecules.
Answer: C
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The diagram below shows a light curve from a supernova. How many days after maximum light did it take for the supernova to decrease in brightness by a factor of 100?
a.
less than 50
b.
50
c.
150
d.
250
e.
more than 250
An electron in a hydrogen atom makes a transition from the n = 4 to the n = 3 energy state. Determine the energy (in eV) of the emitted photon
a. 0.54 b. 0.66 c. 0.85 d. 1.51 e. 10.2
Why does Jupiter have three distinct layers of clouds?
A) Clouds form randomly, so on average there are always three layers. B) The three layers represent clouds made of gases that condense at different temperatures. C) Jupiter has three different types of wind, each of which makes a different type of cloud. D) The three layers reflect regions of Jupiter's atmosphere with different overall chemical compositions.
Identical 4.0-?C charges are placed on the y axis at y = ±4.0 m. Point A is on the x axis at x = +3.0 m. Determine the electric potential of point A (relative to zero at the origin)
a. ?4.5 kV b. ?2.7 kV c. ?1.8 kV d. ?3.6 kV e. ?14 kV