If a carbon atom combines with oxygen atoms to form CO2, this would be described as a

a. Physical change.
b. Chemical change.
c. It is both a physical and chemical change.
d. First, it is a physical change, but then it becomes a chemical change.
e. It is not a physical change or a chemical change. It is scientific change.


B

Environmental & Atmospheric Sciences

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a. true b. false

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