化肥对提高农作物的产量具有重要的作用,碳铵(碳酸氢铵)就是农民朋友经常使用的一种氮肥,碳铵易溶于水、受潮时常温分解,温度越高分解越快,遇碱时放出氨气.某校化学兴趣小组为测定某碳铵肥料样品的纯度,将8.5g样品加入足量的浓氢氧化钠溶液中共热,(碳铵中的杂质不与氢氧化钠反应,反应的方程式为NH4HCO3+2NaOH=Na2CO3+2H2O+NH3↑),把产生的所有NH3用足量的硫酸溶液吸收,同时测量两分钟内硫酸溶液增加的质量,结果如下表所示.
试回答下列问题:
This is a picture of Mr. Green's family. 1 the picture we can see Mr. green, Mrs. Green, their son Jim 2 their daughter Susan. Mr. Green is3 in a chair. He is 4 a newspaper. Mrs. Green 5 some housework. Jim is a Middle School student. He is reading a book near the window. Look at 6 , she is playing with her toys 7 the floor. She is Mr. Green and Mrs. Green's daughter, Susan. 8 that behind Susan? It's a 9. What's the cat doing? It's playing 10 a ball.