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Suppose an experiment measures a mass, heats it over a flame without changing its state, measures it again, and finds the mass to be different. Which statement BEST describes the kind of change that could have taken place? A. physical change because the substance became more dense B. chemical change because mass was lost, most likely as a gas C. chemical change because the chemical property of mass changed D. physical change because the mass melted going from a solid to a liquid
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B. chemical change because mass was lost, most likely as a gas. This BEST describes the kind of change that could have taken place.
Expert answered|hvnscentme|Points 40|
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Asked 4/9/2014 6:13:14 PM
Updated 4/9/2014 7:23:23 PM
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This answer has been confirmed as correct and helpful.
Edited by jeifunk [4/9/2014 7:23:22 PM], Confirmed by jeifunk [4/9/2014 7:23:23 PM]
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Updated 1/14/2017 4:50:08 AM
1 Answer/Comment
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Added 1/14/2017 4:50:08 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [1/14/2017 6:43:05 AM]
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Updated 4/8/2014 6:56:13 PM
1 Answer/Comment
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Which chemical equation is balanced? A. H2 + O2 - > H2O B. H2 + O2 - > 2H2O C. 2H2 + O2 - > 2H2O D. 2H2 + 2O2 - > 2H2O
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Updated 4/9/2014 11:48:32 PM
1 Answer/Comment
The coefficients that balance this equation 4Al + 3O2 -> 2Al2O3 is: D. 4, 3, 2
Added 4/9/2014 11:48:32 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [4/9/2014 11:56:42 PM]
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