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A given chemical substance always contai...

A given chemical substance always contains the same elements combined in a fixed proportion by mass. Guess the compounds formed in the ratio of `1:1` and `1:2` by carbon and oxygen.

A

`CO_2,CO`

B

`CO,CO_3`

C

`CO_2,CO_3`

D

`CO,CO_2`

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The correct Answer is:
D
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