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A sample of Ascorbic acid (vitamin C) is synthesized in the laboratory; it contains 1.50 g of Carbon and 2.00 g of Oxygen. Another sample of Ascorbic acid isolated from citrus fruits contains 6.35 g of carbon. How many grams of Oxygen does it contain ? Which law do you assume in answering this question ?

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6.35 : Law of multiple proportions

6.35 : Law of definite proportions

7.25 : Law of conservation of mass

8.47 : Law of definite proportions

answer is C.

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Detailed Solution

Based on Law of definite proportions: Ascorbic acid formula is $C_{6} H_{8} O_{6}$
72 g of Carbon – 96 g of Oxygen
6.35 g of Carbon – x g of Oxygen
$∴ x = 8.46 g$

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