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Q.

The same proportion of carbon and oxygen in CO2 obtained from different sources proves the law of_______.

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a

Constant proportion

b

Conservation of mass 

c

Reciprocal proportion

d

Multiple proportions

answer is C.

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Detailed Solution

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  • The same proportion of carbon and oxygen in CO2 obtained from different sources proves the law of constant proportion.
    According to the rule of constant proportions, chemical compounds are composed of components that are present in a set ratio by mass. 
  • This means that each pure sample of a compound, regardless of its source, will always contain the same components in the same ratio by mass. 
  • Any water molecule, for example, is always composed of two hydrogen atoms and one oxygen atom in a 2:1 ratio.
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