The uranium minerals found in nature must be refined and enriched in 2..U before
ID: 553656 • Letter: T
Question
The uranium minerals found in nature must be refined and enriched in 2..U before the uranium can be used as a fuel in nuclear reactors. One procedure for enriching uranium begins with the reaction of natural UO2 with HF to form UF4, which is then converted into UF6 by reaction with fluorine: 0(8)-4H (g)U,()+21,o) F)+F2 ) UF() 1st attempt Part 1 (0.5 point) See Periodic Table How many kilograms of HF are needed to completely react with 4.26 kg ofUO2? kg HF Part 2 (0.5 point) O See Hint How muchUFcan be produced from 610.5 g of UO2? 8 UF6Explanation / Answer
part 1
from equation,
1 mol UO2 = 4 mol HF
no of mol of UO2 taken = 4.26*10^3/270 = 15.78 mol
no of mol of HF required = 15.78*4 = 63.15 mol
mass of HF = 63.15*20/1000 = 1.263 kg
part 2
from equation,
1 mol UO2 = 1 mol UF6
no of mol of UO2 taken = 610.5/270 = 2.26 mol
no of mol of UF6 = 2.26 mol
mass of UF6 produced = 2.26*352.02 = 795.56 G
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