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氨气与氟气在铜的催化作用下反应得到一种铵盐NH4F和一种含氮化合物A,A的分子结...

氨气与氟气在铜的催化作用下反应得到一种铵盐NH4F和一种含氮化合物A,A的分子结构呈三角锥形,分子中所有共价键之间的夹角都相等。

(1)A的化学式为                                                                                                         ,A的电子式为                                                                                                                                 

(2)写出该反应的化学方程式                                                                                                                                                                                                                                                                      

(3)现有1 mol混合气体充分反应后,测得生成物NH4F中的N元素比A中的N元素多2.8 g,试计算原混合气中NH3和F2的物质的量可能各是多少?

 

(1)NF3, (2)4NH3+3F23NH4F+NF3 ∴n(NH3) = 0.4 mol,n(F2) = 0.6 mol 或n(NH3) = 0.7 mol,n(F2) = 0.3 mol 28 Δm (N) 0.3 0.4 4 3 4NH3+3F23NH4F+NF3 【解析】 2.8 (3) 【解析】
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