皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【简答题】
(14分)碳氧化物和氨氧化物在工业生产中有着广泛应用。 (1)工业上利用CO和H 2 在催化剂存在下合成甲醇。 主反应:CO(g)+2H 2 (g)=CH 3 OH(g)              △H=-91kJ.mo1 -1 副反应:2CO(g)+4H 2 (g)=CH 3 OCH 3 (g)+H 2 O(g)  △H=-206 kJ.mo1 -1 ①反应2CH 3 OH(g)=CH 3 OCH 3 (g)+H 2 O(g)的△H= kJ.mo1 - 。 ②工业中常用醇为燃料制成燃料电池(如右图所示),通入甲醇的电极是 极(填“正”或“负”);该电池的正极反应式为 。 (2)氮氧化物进入大气后,可形成硝酸型酸雨和光化学烟雾,必须对其进行处理。 ①用过量的NaOH溶液吸收NO 2 气体,所得的溶液中除了含有NaOH,还含有 。 ②为避免污染,常给汽车安装尾气净化装置。净化装置里装有催化剂,气体在催化剂表面吸附与作用的机理如右图所示。写出净化过程中的总化学反应方程式: 。 ③某工厂排出的尾气中NO x 的含量为0.56%(体积分数),用氨气可以将其转化为无害气体,发生的反应为:6NO x +4xNH 3 =(3+2x)N 2 +6xH 2 O若处理1× L(标准状况)该尾气需42.5gNH 3 ,则x= 。
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【简答题】运动传导路是大脑皮质至躯体运动________的神经联系,分为________和________两部分。
【单选题】书写病室报告时应先写
A.
新入院的病人
B.
危重病人
C.
施行手术的病人
D.
入的病人
E.
出院的病人
【单选题】书写病室报告时应先书写( )
A.
迁床患者
B.
危重患者
C.
新入院患者
D.
出院患者
E.
转出患者
【单选题】Geography is the study of the relationship between people and land. Geographers compare and contrast【C1】______places on the earth, but they also【C2】______beyond the individual places and consider the ...
A.
distant
B.
similar
C.
various
D.
famous
【单选题】Geography is the study of the relationship between people and the land. Geographers compare and contrast various places on the earth. But they also 【B1】 beyond the individual places and consider the e...
A.
pass
B.
reach
C.
go
D.
set
【单选题】Geography is the study of the relationship between people and the land. Geographers (地理学家) compare and contrast【C1】______ places on the earth. But they also【C2】______beyond the individual places and c...
A.
similar
B.
various
C.
distant
D.
famous
【单选题】Geography is the study of the relationship between people and the land. Geographers compare and contrast【C1】______ places on the earth. But they also【C2】______ beyond the individual places and conside...
A.
similar
B.
various
C.
distant
D.
famous
【单选题】夫:ちょっと 本屋に 行ってくるよ。 妻:あ、そう。出かける( )( )(★)( )?
A.
たまごを買ってきて
B.
なら
C.
帰りに
D.
くれない
【单选题】Geography is the study of the relationship between people and the land. Geographers compare and contrast【C1】______ places on the earth. But they also【C2】______ beyond the individual places and conside...
A.
similar
B.
various
C.
distant
D.
famous
【单选题】Geography is the study of the countries of the world and of such things ______ the land, seas, climate, towns, and population.
A.
as
B.
that
C.
which
D.
what
相关题目:
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题