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(iii) By the action of dilute hydrochloric acid on marble pieces.
It has been observed that each sample of carbon dioxide contains carbon and oxygen elements in the ratio of 3:8 by weight
In the second sample of the oxide,
Wt. of metal = 1.50 g, wt. of oxygen = (2.50 = 1.50) g = 1g
Thus, in both samples of the oxide the proportions of the weights of the metal and oxygen are fixed. Hence, the result follws the law of constant proportion.
