[填空题]
A sample of 9.70 g of fc(6bxml7y .t r8;v b4f0ja rfan unknown organic compound composed of carbon, hydrogen, and nitrogen was burnt with excess oxygen. The combustionf r0vjfr a;48b produced nitrogen gas,27.5 g of $CO_2$ and 6.57 g of $H_2O$.
1.Calculate the mass of nitrogen produced.$m_C$ , $m_H$ , $mN_N$=
2.Determine the empirical formula of the compound.
