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Coal contains carbon and other elements. Carbon dioxide forms
when coal burns in the presence of oxygen. Which of these is the
best evidence that a chemical reaction occurs when coal burns?
A).Oxygen is present.
B).Coal is made up of more than
one element.
C).A new substance is produced.
D).The shape of the coal changes. Help
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Answers: 2
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Coal contains carbon and other elements. Carbon dioxide forms
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