成都二十中高2022届高三上期12月测试题各科试题及答案

成都二十中高2022届高三上期12月测试题各科试题及答案，目前我们趣对答案已经整理了成都二十中高2022届高三上期12月测试题各科试题及答案的各科答案和试卷，更多试卷答案请关注本趣对答案。

第二节One possible version:Dear AliceHow are you doing these days?From your letter, I know that you won first place inthe speech contest of your schooL. Congratulations! Istrongly believe that you have the ability and undoubtedlyyour hard work and determination contribute to your suc-several months since I entered Senior Three. Dur-Sometimes when I meet with some difficulties, I feelenoccupies most of my time, for I know success lies in hardwork. Only by making every effort will I realize my dreamg Peking UniveWelcome to China if it is convenient for you! I promise that I will take you to many places of interest and youcan taste delicious dishes. I know you must like itI'm looking forward to your replyYoursLi H

17.(10分)(1)①Fe+为过氧化氢分解的催化剂(2分)②2HIO+H2O2=12+2HO+O2↑(2分)2H2O2=2H2O+O2↑(2分)(2)①n(CO2)n(N2)=2:1(2分)②Cr2OH-+6Fe2++14H+=2Cr3++6Fe3++7H2O(2分)【解析】(1)①Fe2+可作过氧化氢分解的催化剂。②I2与H2O2发生反应H2O2+I2=2HIO,2H0O+H2O2=I2+2H2O+O2↑。总的化学方程式为2H2O22H2O+O2↑(2)①发生反应2CN-十80H+5C2=2CO2+N2+10C-+4H2O,生成CO2和N2的物质的量之比为2:1。②酸性环境下,Cr2O能够将Fe2+氧化成Fe3+,本身被还原为Cr3+,反应的离子方程式为cr2O+6Fe2++14H+=2C3++6Fe3++7H2O。