题目

Students often meet with questions as follows: bullied by someone, worried about a weak subject, puzzled by family problems or concerned about pets at home. All the questions above may make you not concentrated on your study. Who can you turn to if you are such an unlucky student? A great person to share your thoughts and feelings with is your school counselor(顾问).      Add school counselors to the list of people you can turn to when you need help. They know how to listen and can help kids with life’s challenges (挑战) . Counselors have special training in how to help kids solve pr某同学为了检验家里购买的硫酸铵化肥是否合格，称取了27.5 g化肥样品与足量浓烧碱溶液一起加热，产生的氨气用足量的100.0 g废硫酸吸收，测得吸收氨气后的溶液总质量为106.8 g，已知合格硫酸铵化肥中含氮量不低于20%。所涉及的反应为：(NH4)2SO4+2NaOHNa2SO4+2NH3↑+2H2O,2NH3+H2SO4=(NH4)2SO4。试计算：(1)化肥样品完全反应后产生氨气_________g。(2)该化肥的含氮量为____________(精确到0.1%)，属于_____________(填“合格”或“不合格”)产品。