The N in a 0.4984-g sample of organic material is converted to NH4HSO4 by digestion with concentrated H2SO4. If the NH4+ ions are precipitated as (NH4)2PtCl6 and the precipitate is ignited to Pt, what is the percentage of N in the sample if the Pt weighs 0.1876 g?
Percentage of N =78.4%
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