tamyasanders12
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The gas carbon dioxide is a pure substance. Which of the following is true about carbon dioxide ?

Carbon and oxygen are chemically bonded in it.

Carbon and oxygen retain their original identity in it

It can be separated into carbon and oxygen using physical methods

The proportion of carbon and oxygen is different in different samples of the gas

Respuesta :

sapkobim000

Answer:

Carbon and oxygen are chemically bonded in it.

Explanation:

The other answer choices do not apply for compounds, but rather for mixtures instead.

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saultavarez1100

Answer:

The proportion of carbon and oxygen is different in different samples of the gas.

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