题目

单词拼写 1. The newspaper is full of________________ (广告). I don’t want to read it. 2. Yao Ming’s ___________(高度) makes him stand out in many people. 3. Betty is one of the __________(苗条的) girls in her class. 4. If you don’t know what to do, I will give you some _________(忠告). 5. English is one of the most important ____________(语言) in the world. 6. Sam is weak in Maths, but he is good at ______________(地理). 7. ----What do we call students in 12th grade?----We call them____________. 8.----Why don’ you like listening to this song?----Because 向某密闭容器中加入0.3mol A、0.1mol C和一定量的气体B三种气体,在一定条件下发生反应,各物质浓度随时间变化如下面图1所示.下面图2为t2时刻后改变容器中条件,平衡体系中速率随时间变化的情况且t2-t5四个阶段都各改变一种条件,所用条件均不同.t3-t4阶段为使用催化剂.(1)若t1=15s,则t0-t1阶段以C浓度变化表示的反应速率为 v(C)= mol/(L?s);(2)若t2-t3阶段,C的体积分数变小,此阶段v正 v逆;(填“大于”、“小于”或“等于”).(3)B的起始物质的量为 mol;(4)t1时刻,平衡常数K= ;(5)t5-t6阶段容器内A的物质的量共减小0.03mol,而此过程中容器与外界的热交换总量为a KJ,写出该反应的热化学方程式 ;(6)若t2时刻后图象变化如图3图4,则改变条件为 ;a.恒温恒压下,按照2:1比例充入任意量的B和Cb.恒温恒压下,加入0.24mol A、0.06mol B和0.14mol Cc.恒温恒压下,加入0.12mol A、0.1mol B和0.22mol Cd.恒温恒压下,加入0.14mol B和0.30mol C.
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