问题 选择题

设NA为阿伏加德罗常数的值。下列说法正确的是

A.在反应5NH4NO3 2HNO3+4N2↑+9H2O中,每生成4 mol N2,转移电子数为10NA

B.12.5 mL 16 mol·L-1浓硫酸与足量铜反应,转移电子数为0.2NA

C.标准状况下,1.12L的SO3所含的原子数约为0.2NA

D.标准状况下,2.2gCO2气体中所含分子数为0.05NA

答案

答案:D

题目分析:A、反应5NH4NO32HNO3+4N2↑+9H2O中,根据价态归中规律,每生成4 mol N2,转移电子数为15NA,错误;B、12.5 mL 16 mol·L-1浓硫酸与足量铜反应,随着反应的进行硫酸的浓度逐渐变稀,稀硫酸和铜不反应,转移电子数小于0.2NA,错误;C、标准状况下, SO3不是气体,错误;D、标准状况下,2.2gCO2气体中所含分子数为0.05NA,正确。

开放性试题

为了让九年级的学生对责任问题有一个更全面、准确的认识,成为真正负责任的现代中学生,某中学初三X班准备利用班会课,根据所学思想品德知识,举行一次“在承担责任中成长”的主题班会。假如班会课由你组织策划,请打开你智慧的宝囊,完成下列问题。

(1)请结合班会课的主题,为班会课设计两条宣传标语。

                                                                                                                                                          

                                                                          

(2)活动过程中如果需要你就责任问题进行典型发言,请简单列举一下你可能会在发言中用到的思想品德知识点。(至少两个)

                                                                                                                                                        

                                                                                                                                                                

                                                                                                                   

(3)班会课结束后,如果由你奉献结束语,你会怎样发言? 

                                                                                                                                                          

                                                                                                                                                               

                                                                                                                                                               

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