Question #0ebb5

1 Answer
Manish Bhardwaj
May 18, 2016

let us assume that we ave started with 100 g of compound and the compound on decomposition gives 67.62 g ( 67.62%) of Uranium and 32.38 g ( 32.38%) of fluorine.

Step II Calculate the number of moles of each element \

#n_U# = 67.62 g / 238 g #mol^-1#

#n_U# = 0.284 mol

#n_F# = 32.38 g / 19 g #mol^-1#

#n_F# = 1.70 mol

Step III ; Calculating the simple whole ratio

U = 0.284 / 0.284 = 1 and F = 1.70 / 0.284 = 6

the empirical formula is #U_1# # F _6# or U# F _6#

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