某一元有机羧酸的铵盐7.7g,与足量的碱石灰混合后共热,收集到氨

某一元有机羧酸的铵盐7.7g,与足量的碱石灰混合后共热,收集到氨气(标准状况下)的体积为2.24L,则形成此盐的有机羧酸的结构简式为(  )

ACH3COOH

BCH3CH2COOH

CHCOOH

DCH3CH2CH2COOH

答案

解析:RCOONH4的式量为M

RCOONH4  ~  NH3

     1              22.4

                 2.24L

M77RCOOH的式量为:77M(NH)160

一元饱和羧酸可表示为CnH2nO2,即14n3260,则n2

此一元羧酸为CH3COOH

答案:A

相关题目

—I’d like to invite you to a concert this evening. —Thank you,but I’ll b
—I’d like to invite you to a concert this evening. —Thank you,but I’ll be free I’m not sure at that moment. 【陕西西安一中2010-2011学年高三下学期综合冲刺卷】【名词性
如果数轴上的点A对应有理数为-2,那么与A点相距3个单位长度
如果数轴上的点A对应有理数为-2,那么与A点相距3个单位长度的点所对应的有理数为___________。
Sam is a little boy, and he is only seven years old. One day he goes to the cin
Sam is a little boy, and he is only seven years old. One day he goes to the cinema(电影院). It is the first time for him to do that. He buys a ticket and then goes in. But after two or three min
微波炉是一种家用的食品加热炉,它利用了A.电流的热效应
微波炉是一种家用的食品加热炉,它利用了A.电流的热效应     B.光波的能量    C.红外线的热作用    D.微波的能量 
根据欧姆定律,下列说法正确的是 A.从R=U/I可知,导体的电
根据欧姆定律,下列说法正确的是 A.从R=U/I可知,导体的电阻跟加在导体两端的电压成正比,跟导体中的电流成反比 B.从R=U/I可知,对于某一确定的导
清末民初山西有一首歌谣:破戏台,烂秀才,小足板子洋烟
清末民初山西有一首歌谣:破戏台,烂秀才,小足板子洋烟袋;火车站,德律风(指电话),大足板子毕业生。这反映出当地                 
Robert is said _____ abroad, but Idon’t know what country he studied in. A. to
Robert is said _____ abroad, but Idon’t know what country he studied in. A. to havestudied   B. to study      C. to be studying   D. tohave been studying  
 The fact puzzled Jack much ________ he has been unable to pass the driving te
 The fact puzzled Jack much ________ he has been unable to pass the driving test up to now. A. why              B. because           C. how            D. that

最新题目