The amount of nitrogen in an organic subsxtance can be determined by an anlytical method called the Kjeldahl method, in which all the nitrogen in the organic substance is converted to ammonia. The ammonia, which is a weak base, can be neutralized with hydrocholoric acid, as described in the equation. NH3(aq) + HCl(aq) arrow NH4Cl(aq) If 22.0 mL of 0.150 M HCL (aq) is needed to neutralize all the NH3(g) from a 2.25 g sample of organic material, calculate the mass percentage of nitrogen in the sample.