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Q: Which statement is true about oxygen-17 and oxygen-18? A. They do not have the same number of protons. B. C. They are isotopes of oxygen. D. The have the same mass number.
A: C. They are isotopes of oxygen.
Expert answered|thederby|Points 1206|
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Asked 5/22/2012 9:21:54 AM
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what helps explain the trend in life expectancy in America? A. Multinational corporations have increased. B. Health care technology has improved. C. Satellites broadcast television around the world. D. More immigrants enter the country every year.
Weegy: D. More immigrants enter the country every year. (More)
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Expert Answered
Updated 8/26/2014 7:02:15 AM
1 Answer/Comment
Health care technology has improved. This helps explain the trend in life expectancy in America.
Added 8/26/2014 7:02:14 AM
This answer has been confirmed as correct, not copied, and helpful.
Which of the following is NOT a pure substance? A. milk B. oxygen C. water D. carbon dioxid
Weegy: A. Milk (a mixture of water, sugar, fat, protein and other minor things) is NOT a pure substance. (More)
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Expert Answered
Updated 1/15/2014 1:46:08 PM
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what does sublimation mean
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Expert Answered
Updated 9/15/2014 6:23:30 AM
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Sublimation in chemistry is the transition of a substance directly from the solid to the gas phase without passing through an intermediate liquid phase.
Added 9/15/2014 5:42:24 AM
This answer has been confirmed as correct, not copied, and helpful.
Confirmed by jeifunk [9/15/2014 6:23:34 AM]
Group 7A of the periodic table contains the what A. most reactive nonmetals. B. most reactive metals. C. least reactive nonmetals. D. least reactive metals.
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Not Answered
Updated 10/22/2014 7:07:38 PM
1 Answer/Comment
Group 7A of the periodic table contains the: Most reactive nonmetals.

Added 10/22/2014 7:07:31 PM
This answer has been confirmed as correct, not copied, and helpful.
Confirmed by jeifunk [10/22/2014 7:08:55 PM]
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