Question

Carbon and oxygen combine in a ratio of 3:8 by mass to form carbon di oxide .
Deduce the ratio by the no of atoms in the compounds

Answer 1

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Answer 2

The ratio by the number of atoms in $CO_2$ is 1:2

Explanation:

• As per the given statement, it is inferred that 3 atoms of carbon combine with 8 atoms of oxygen to form carbon dioxide.
• To find the ratio, the number of atoms involved must be divided by the atomic weight of the atom.
• Accordingly, in the case of carbon and oxygen it is:

Ratio of 'C' = $\frac{Number of atoms}{Atomic weight of the atom}$

Ratio of 'C' = $\frac{3}{12}$

Ratio of 'C' = 1 (approximately)

Ratio of 'O' =  $\frac{Number of atoms}{Atomic weight of the atom}$

Ratio of 'O' = $\frac{8}{16}$

Ratio of 'O' = 2

• Thus it is inferred that the ratio by the no of atoms in carbon dioxide is 1:2.

Learn more about such concept

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