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One of the following is correctly termed a substance, and the others are mixtures. The substance is - A. milk. B. marbled rocks. C. iron. D. baked potato soup.
B. carbon has 6 protons in its nucleus.
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User: Which element above has 6 protons in its nucleus? A. oxygen B. carbon C. phosphorus D. sulfur

User: One of the following is correctly termed a substance, and the others are mixtures. The substance is - A. milk. B. marbled rocks. C. iron. D. baked potato soup.

Weegy: B. carbon has 6 protons in its nucleus.
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Asked 7/30/2012 1:28:04 AM
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A catalyst - A. causes a reaction. B. increases a reaction's rate. C. has no effect on a reaction. D. raises the temperature for a reaction
Weegy: B User: A catalytic converter in a car uses a metal catalyst to change carbon monoxide and nitric oxide into less harmful compounds. The catalytic converters last a long time because A. the catalyst is not changed by the reactions. B. there is a lot of catalyst present in the converter. C. the catalyst is easily replaced during regular maintenance. D. there are very few molecules of carbon monoxide and nitric oxide produced. Weegy: D. there are very few molecules of carbon monoxide and nitric oxide produced. (More)
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Updated 7/30/2012 4:44:02 AM
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The catalytic converters last a long time because A. the catalyst is not changed by the reactions.

Added 7/30/2012 4:44:03 AM
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