2. Calculate the specific surface in square centimeters per ram of pyrite having the screen analysis below. Specific gravity of pyrite = 5.0. 1 1 - Mesh 20 + 28 28 +35 - 35 + 48 48 + 65 G5 +100 -100 +150 -150 +200 - 3 + 1 4 + 6 6 + 8 8 + 10 10 + 14 14 - 20 Percentage Retained () 4.0 7.2 12.0 17.6 15.4 12.0 10.0 7.2 6.0 3.8 2.8 2.0

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