首页
普通专升本
成人高考
学位英语
在线刷题
最近学习
最近学习课程
最强大脑 · 3天挑战极限记...
副标题副标题副标题副
最强大脑 · 3天挑战极限记...
副标题副标题副标题副
您现在位置：
模拟考场
>
湖北成人高考
>
高起点
>
物理化学综合
>
浏览试题
[主观题]
某温度下Na2SO4的饱和溶液20克，加入过量的BaCl2溶液可析出9.32克白色沉淀，求该温度下Na2SO4的溶解度和Na2SO4溶液的溶质质量分数。
收藏
查看答案
参考答案
试题答案：
【考情点拨】本题考查了溶解度与溶质质量分数的计算的知识点。
答案解释：
相关题目
某温度下Na2SO4的饱和溶液20克，加入过量的BaCl2溶液可析出9.32克白色沉淀，求该温度下Na2SO4的溶解度和Na2SO4溶液的溶质质量分数。
如图所示，一矩形线圈长为a，宽为b，线圈电阻为R。从磁感应强度为B的匀强磁场中以速度v匀速拉出来，其产生的感应电动势和矩形线圈中的电流大小为（ ）
配制三氯化铁溶液时，若想得到澄清的溶液，并且又不引入杂质离子，应加入__________。
光从甲介质射人乙介质，由图可知（ ）
向硫酸铝溶液中加入氨水，其反应的离子方程式为__________。
要除去硫酸亚铁溶液中含有的少量Fe3+和Cu2+，最好加入的试剂是__________。
如图是某区域的电场线图。A、B是电场中的两个点，由图可知电场强度EA__________EB(填“>”或“”或“<”)。
关于简谐运动，下列说法中正确的是（??）
下列有关实验用品的使用或实验操作的叙述正确的是（??）
对于某一个电容器，下列说法中哪个正确（??）
热门试题
1.
The conceptualist view was proposed by the ancient Greek scholar Plato.（ ）
2.
10.《朝鲜民主主义人民共和国儿童保育教养法》颁布于哪一年？
3.
37．简述幼儿园户内活动区创设的基本原则。
4.
3. Friction is a force which opposes motion. Much of the energy supplied to a complicated machine with many moving parts is wasted in overcoming this opposition. The energy is converted into useless heat. The amount thus lost can be considerably reduced and the life of the machine prolonged by careful lubrication. This reduction improves the efficiency of the machine. Another way in which friction is reduced is to substitute roller or ball bearings for the earlier type of bearing, in which the surfaces in contact move by sliding. Bearings of these later types are used very extensively in many kinds of modern machinery.It must not be assumed, however, that friction is always a disadvantage. In many instances it is highly important. Belts are often used in conveying power from one machine to another. In the absence of friction, this could not be done. The driving wheel would not run the belt, neither would the belt run the wheel to driver. Without friction, then, belted machinery could not be used. Again in the case of all motor vehicles, friction is essential in the operation of the brake. Were there no friction, there could be no brake. But even this illustration does not give an adequate picture of the importance of friction. The vehicle could not even be started if it were not for the friction exerted between the tires and the road. Nails hold in wood, and screws hold in either wood or metal by reason of friction, without which they would be useless. Walking is difficult enough on an icy pavement, but it would be wholly impossible if there were no friction at all between the shoe and the pavement.(5分)3.1 Friction arises when____.(1分)A. an opposing force of motion exists B. the energy is wastedC. everything is motionlessD. a complicated machine is supplied with energy
5.
阅读辛弃疾《摸鱼儿》(更能消、几番风雨)：
热门试卷
成人高考专升本《政治》模拟试卷
去做题
已有3410做题
2020年湖北成人高考专升本政治模拟试题三
去做题
已有2205做题
成人高考专升本政治考试模拟试题及答案(1)
去做题
已有1893做题
湖北成考专升本政治真题（2021年）
去做题
已有1324做题
成人高考高起点语文考试高分突破试题及答案四
去做题
已有1189做题
