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Question

0.1 mole of carbohydrate with empirical formula CH2O contains 1 g of hydrogen what is its molecular formula?

A
C5H10O5
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B
C6H12O6
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C
C4H8O4
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D
C3H6O3
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Solution

The correct option is A C5H10O5
Let molecular formula be (CH2O) n
In one mole of carbohydrate, there is 2n g of hydrogen present.
So, 0.1 mole of carbohydrate there is 2n/1×0.1 g of hydrogen which is equal to 1g
2n/1×0.1= 1
n=5
Molecular formula = C5H10O5

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