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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
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A melt containing 900 moles of anorthite and 100 moles ot diopside undergoes crystallization. the number of moles of anorthite that crystallizes as the melt co
A melt containing 900 moles of anorthite and 100 moles ot diopside undergoes crystallization. The number of moles of anorthite that crystallizes as the melt composition moves from P to O is P 1553 1500 Melt 1400 Anorthite + Melt 1300 Diopside+ Melt 1274 1200 Diopside + Anorthite Di 20 40 50 60 80 90 An
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Rahul kumar Best Answer
Answer: 800 moles Using lever rule; Fraction of Anorthite crystallized as melt composition moves from P to Q is: (90-50) / (100-50) = 40/50 = 0.8 Total number of moles in melt = 900+100 = 1000 From P to Q, only Anorthite will be crystallized. Number of moles of Anorthite crystallized = Fraction × Total number of moles in melt = 0.8 × 1000 = 800 moles Number of moles of Anorthite crystallized = 800
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