试题与答案

阿伏加德罗常数约为6.02×1023mol-1,下列叙述正确的是() A.常温常

题型:选择题

题目:

阿伏加德罗常数约为6.02×1023mol-1,下列叙述正确的是              (   )

A.常温常压下,18.0 g NH4+中所含的质子数为6.02×1024

B.250mL2mol/L的氨水中含有NH3·H2O的分子数为0.5×6.02×1023

C.1 L 1 mol/L的K2CO3溶液中离子总数大于3NA

D.1mol Cl2参加的任何反应,反应过程中转移电子数都是2NA

答案:

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参考答案:D解析: 本题考查信息系统建设中的组织和领导的原则。项目领导小组选定系统分析员和任命研制组组长,故选项A不符合题意:项目开发小组还应包括企业高层管理者、精通业务的专业人员、咨询专家等,故选...

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