In organic molecules, a carbon atom will normally form how many bonds?
a. 1
b. 4
c. 3
d. 2
e. 0
b
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Index of Refraction: Light of wavelength 550 nm in air is found to travel at 1.96 × 108 m/s in a certain liquid. What are the frequency and wavelength of the light in this liquid? (c = 3.0 × 108 m/s)
What will be an ideal response?
What kinds of atomic nuclei formed during the nucleosynthesis era?
A) only hydrogen B) essentially all of the chemical elements, except for those heavier than uranium C) roughly equal amounts of hydrogen, helium, lithium, beryllium, and boron D) only helium E) hydrogen, helium and trace amounts of lithium, beryllium, and boron
In most months, there are no eclipses
a. True b. False Indicate whether the statement is true or false
The meter is presently defined as
a. one ten-millionth of the diameter of Earth. b. the wavelength of a line in the spectrum of krypton-86. c. the length of a platinum-iridium bar. d. the distance light travels in a vacuum in a very short time.