Hydrogen fluoride is used in the manufacture of Freon (which also destroys ozone in the stratosphere) and in the production of aluminum metal. It is prepared by the reaction
CaF2 + H2SO4 → CaSO 4 + 2HF
In one process, 6.00 kg of CaF 2 are treated with an excess of H 2SO4 and yield 2.86 kg of HF. Calculate the percent yield of HF.
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