The amonia evolved from 2 ~g of a compound in Kjeldahl's estimation of nitrogen neutralizes 10 ~mL of 2 M H ₂ SO ₄ solution. The weight percentage of nitrogen in the compound is

Step-by-step solution

array c 2 NH ₃+ H ₂ SO ₄ ( NH ₄ )₂ SO ₄ 10 ml 2 M array millimole of H ₂ SO ₄= mmol of NH ₃ 2 =20 mmol NH ₃= mmol of N=40W_ N = 40 14 1000 = 560 1000 =0.56 ~g % of N= 0.56 2 100=28