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  3. For 109% labeled oleum if the number of moles of H2SO4 and free SO3 be x and y respectively

. For 109% labeled oleum if the number of moles of H2SO4 and free SO3 be x and y respectively

For 109% labeled oleum if the number of moles of H2SO4 and free SO3 be x and y respectively, then what will be the value of x + y/x – y?

A. 1

B. 18

C. 1/3

D. 9

Best Answer

Correct Answer is: D. 9

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