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Hydrogen fluoride is used in the manufacture of Freons (which destroy ozone in the stratosphere) and in the production of aluminum metal. It is prepared by the reaction below.
CaF2 + H2SO4 CaSO4 + 2 HF
In one process 7.00 kg of CaF2 are treated with an excess of H2SO4 and yield 2.26 kg of HF. Calculate the percent yield of HF
