The ratio of carbon and oxygen in co2 always is 3:8 by mass. What is the significance of the statement?
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Carbon and oxygen reacts in a ratio 3:8 by mass to form Carbon dioxide
Hence the required reaction is ;
C + O2 --> CO2
Carbon : Oxygen = 3 : 8
Due to law of constant proportion, the mass ratio in which the reactants will react will remain constant.
Carbon --> 9 g
Oxygen --> ?
C : O2 = 3:8
9 : O2 = 3:8
9/O2 = 3/8
Mass of oxygen required
= (9/3)×8
= 3×8
= 24g
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Explanation:
LAW OF CONSTANT OR DEFINITE PROPORTION : It was given by Proust.
It states that all chemical compounds are found to have constant composition irrespective of their method of preparation or sources.
THE LAW OF MULTIPLE PROPORTION : It was given by Dalton.
It states that when one element combines with the other element to form two or more different compounds, the mass of one element which combines with a constant mass of the other bear a simple ratio to one another.
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