5. A portion of 10.05 g of Hg(NO3)2*2H2O was dissolved in a 250 ml volumetric flask. 16.10 ml of NH4CNS solution (T(NH4CNS) = 0.007092 g/ml) was used to titrate 20 ml of the solution. Calculate the percentage of Hg(NO3)2 in the sample.

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