皮皮学，免费搜题
登录
搜题
【单选题】
用Na 2 C 2 O 4 标定KMnO 4 溶液浓度时, 称取Na 2 C 2 O 4 0.1577 g, 消耗KMnO 4 标准溶液23.56 mL, 则所配KMnO 4 溶液的浓度为( )mol·L -1 (Na 2 C 2 O 4 的摩尔质量为134.0 g·mol -1 )。A.
0.1249
B.
0.01998
C.
0.02
D.
0.0199
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】What will be eaten by the white-tailed deer?
A.
Small plants.
B.
Small animals.
C.
A kind of fish.
D.
A kind of flower.
【单选题】Along the West Lake, what kind of plants usually welcome you by sending out pleasing fragrance in autumn?
A.
Lotus flowers.
B.
Plum flowers.
C.
Osmanthus trees .
D.
Willow trees.
【简答题】What kind of plants is cold weather most likely to damage or kill?
【简答题】情景交际。从方框中选择恰当的句子，补全对话。(其中有两项是多余的) A. What kind of animals do you like best, B. That must be fun. C. What are you thinking about? D. I agree with you. E. As we know, animals are our friends. F. Because...
【简答题】在文中找出下列五个英文问题对应的答案,并请将问题和答案都翻译成汉语。 1.What are the advantages of industrial robots? 2.Are robots used only in the automotive field? 3.Why are robots used in nuclear power plants to handle the radioacti...
相关题目：
参考解析：
知识点：
题目纠错 0
发布
