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Korra Rakesh posted an Question
October 07, 2020 • 21:26 pm 30 points
  • IIT JAM
  • Geology (GG)

7. amelt in the binary system mgo-sio, contains 81.23 wt% sio. if all the magnesium is consum of the to form enstatite (mgsio.), how many moles of this mineral

7. Amelt in the binary system MgO-SiO, contains 81.23 wt% SIO. If all the magnesium is consum of the to form enstatite (MgSio.), how many moles of this mineral will crystallize from 100 grams of the melt? Give answer in two decimal places. AO 1

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    Rahul kumar best-answer

    Answer: 0.47 moles 100 gm of melt will contain 81.23 gm SiO2 and 18.77 gm MgO Moles of SiO2= 81.23/60 = 1.35 Moles of MgO = 18.77/40 = 0.47 0.47 moles of MgO will react with 0.47 moles of SiO2 to form 0.47 moles of MgSiO3. Remaining SiO2 (1.35-0.47= 0.88 moles) will not be a part of MgSiO3 because of unavailability of MgO.

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