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Mathematics 7 Online
OpenStudy (kweenlexis):

Over time, an iron nail reacts with water to produce iron oxide, or rust. Which of the following is a signal that rusting has taken place? A. the release of heat and steam at the area where the mixture occured B. the appearance of sparks C. the release of an odor and the presence of bubbles D. a color change on the nail from silver to reddish-brown

OpenStudy (kweenlexis):

D??

OpenStudy (michele_laino):

correct!

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