6. Can you now write the formula of carbon dioxide? (Hint: It is made up of one atom of carbon and two atoms of oxygen.)

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Solution

Part 1: Definition of compound:
A compound is defined as a pure substance that is made up of two or more elements in a fixed ratio by mass.
Part 2: Formula of Carbon dioxide:
Carbon dioxide is formed when one atom of carbon $(C)$ combines with two atoms of oxygen $(O)$ .
Hence, the formula of Carbon dioxide is ${CO}_{2}$ .

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