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A chemist is studying the byproducts produced during the burning of gasoline.

A chemist is studying the byproducts produced during the burning of gasoline. Gasoline bums by reacting with oxygen to produce water vapor and carbon dioxide. The chemist carefully measures the masses of all the substances involved in this reaction.

Which observation would lead the chemist to conclude that the law of conservation of matter is obeyed in this reaction?

A.

The mass of gasoline is equal to the mass of carbon dioxide.

B.

The mass of gasoline and carbon dioxide is the same as the mass of oxygen and water vapor.

C.

The mass of oxygen is equal to the mass of water vapor.

D.

The mass of gasoline and oxygen is equal to the mass of water vapor and carbon dioxide.

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