Question

The proportion of copper, carbon and oxygen in the copper carbonate are.......by weight. *

3:4:2
3:4:1
5:4:2
5:4:1​

Answer 1

Answer:

Percent composition by element

Element Symbol Mass Percent

Copper. Cu. 51.431%

Carbon. C 9.721%

Oxygen. O 38.848%

Explanation:

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Answer 2

The proportion of copper, oxygen and carbon in the copper carbonate are $5:4:1$ by weight.

Explanation:

• Copper carbonate is $\[CuC{{O}_{3}}\]$.
• The elements present in it are copper,carbon and oxygen atoms.
• Total mass of copper carbonate is $124$.
• The mass of copper in copper carbonate is $63.5$.
• The mass of carbon present in the compound is $12$.

• The mass of oxygen in copper carbonate is $48$

• The mass percentage of copper,carbon and oxygen atoms in copper carbonate  is  $51.2,9.6,37.5$ respectively.

• The proportion of copper, oxygen and carbon in the copper carbonate by weight is hence in the ratio,   $5:4:1$