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24. Which one of the following types of electromagnetic radiation causes certain substances to fluoresce? A. Cosmic rays B. X rays C. Ultraviolet rays D. Infrared waves
Ultraviolet rays cause certain substances to fluoresce.
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Asked 12/20/2015 5:30:33 PM
Updated 12/20/2015 5:58:45 PM
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The process in which a substance changes from a gaseous state to the liquid state is A. critical temperature. B. absolute zero. C. evaporation. D. condensation.
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Updated 3/6/2017 11:46:55 PM
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The process in which a substance changes from a gaseous state to the liquid state is CONDENSATION.

Added 3/6/2017 11:46:55 PM
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One atom of silicon can properly be combined in a compound with A. three atoms of hydrogen. B. four atoms of calcium. C. two atoms of oxygen. D. one atom of chlorine.
Weegy: One atom of silicon can properly be combined in a compound with two atoms of oxygen. (More)
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Updated 12/20/2015 5:19:44 PM
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The valence of aluminum is 3, and the valence of chlorine is 1. The formula for aluminum chloride is correctly written as A. Cl3Al. B. AlCl3. C. ClAl3. D. Al3Cl.
Weegy: The valence of aluminum is 3, and the valence of chlorine is 1. The formula for aluminum chloride is correctly written as: AlCl3. (More)
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Updated 12/20/2015 5:20:44 PM
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Organic chemistry is the study of compounds containing A. oxygen. B. carbon. C. nitrogen. D. hydrogen.
Weegy: Organic chemistry is the study of compounds containing carbon. (More)
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Updated 12/21/2015 10:02:01 AM
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2. Through which one of the following mediums is the velocity of a sound wave the greatest? A. Steel B. Water C. Lead D. Air
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Updated 12/20/2015 4:54:56 PM
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The velocity of a sound wave is greatest in Steel.
Added 12/20/2015 4:54:56 PM
This answer has been confirmed as correct and helpful.
Confirmed by Janet17 [12/20/2015 4:59:04 PM]
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