In the estimation of nitrogen by Kjeldahl's method, 0.933 g of an organic compound 'X' was analyzed. Ammonia evolved was absorbed in 60 mL of 0.1 M H2SO4. The unreacted acid requires 20 mL of 0.1 M NaOH for complete neutralization. The compound 'X' is:

0.53 g of an organic compound (x) of formula CxHyBrz when heated with excess concentrated nitric acid and then with silver nitrate gave 0.75 g of silver bromide precipitate. 1.0 g of (x) gave 1.32 g of CO2 gas on combustion. The percentage of hydrogen in the compound (x) is ________ %. (Molar mass in g mol-1: H : 1, C : 12, Br : 80, Ag : 108, O : 16)

In Dumas method for estimation of nitrogen, 0.50 g of an organic compound gave 70 mL of nitrogen collected at 300 K and 715 mm pressure. What is the percentage of nitrogen in the organic compound? (Aqueous tension at 300 K is 15 mm)