Question

what is a carbon dioxide​

Answer 1

Answer:

a gas that has no colour or smell that people and animals breathe out of their lungs

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Answer 2

$\huge\sf\underline\red{Carbon dioxide}$

Carbon dioxide (chemical formula CO2) is a colorless gas with a density about 53% higher than that of dry air. Carbon dioxide molecules consist of a carbon atom covalently double bonded to two oxygen atoms. It occurs naturally in Earth's atmosphere as a trace gas.