[填空题]
A sample of 9.70 g of an unknown organic cv w+ +xzf8-1emor9 hqx/o- fwuompound composed of carbon, hy4z k)bo+ 8pejydrogen, and nitrogen was burnt with excess oxygen. The combustion produced nitrogen gas,27o8 ey+k bp)4jz.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.
