5. The thioures in a 1 455-g sample of organic matenal was extracted into a dilute HSO solution and strated with 37 31 m. of

5. The thioures in a 1 455-g sample of organic matenal was extracted into a dilute H₂SO₄ solution and strated with 37 31 m. of 0009372 MHg via the reaction

4HCS Hg NHCS

Find the percentage of (NCS (76 12 g/mol) in the sample