What basic type of reaction is illustrated by the general equation AB + CD ? AD + BC?
a. Combination
b. Decomposition
c. Double-replacement
d. Single-replacement
c
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A meter is
A. 1000 times larger than a kilometer B. 100 times longer than a kilometer C. (1 / 10) as long as a kilometer D. (1/ 100) as long as a kilometer E. (1/ 1000) as long as a kilometer
The lowest-mass stars cannot become giants because
a. they do not contain helium. b. they rotate too slowly. c. their convective interiors prevent the development of an inert helium core surrounded by unprocessed hydrogen. d. they contain strong magnetic fields. e. they never use up their hydrogen.
What is proper motion? How is it related to transverse velocity?
What will be an ideal response?
What is the next energy level that fills after the 4d energy level is full?
a. 5p c. 6s b. 4s d. 4f