In the sulfuric acid industry, the name oleum is used for an acid with a purity of 100% that contains free, unreacted SO3 dissolved in the acid. For example, a 20% oleum contains 20 lbs. Of SO3 in 80 lbs. Of 100% acid, for every 100 lbs. Of mix. It is also possible to designate oleum as a percentage of sulfuric acid greater than 100%. It is calculated as the pounds of 100% acid that would be obtained by adding enough water to 100 lb of oleum to dissolve all of the SO3. Using these definitions, calculate: a. The pounds of 25% oleum that can be produced with 100 lb of sulfur. b. The percentage of sulfuric acid that corresponds to oleum of 25%.

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