皮皮学，免费搜题
登录
搜题
【简答题】
有一A和B两化合物混合溶液,已知A在波长282nm和238nm处的百分吸光系数分别为720和270;而B在上述两波长处吸光度相等。现把A和B混合液盛于1.0cm吸收,测得max282nm处的吸光度为0.442;在max238nm处的吸光度为0.278,求A化合物的浓度(mg/100ml)。
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【多选题】发售去边境地区的车票时，应要求旅客出示国务院铁路主管部门、公安部规定的()
A.
边境居民证
B.
身份证
C.
护照
D.
边境通行证
查看完整题目与答案
【单选题】Which of the following is not a use of Standard Positioning Service?
A.
British military user
B.
Chinese civil user
C.
Japanese commercial user
D.
American scientific user
查看完整题目与答案
【单选题】原肠胚与外界相通的开孔,称为
A.
后口
B.
胚口
C.
胚孔
D.
后孔
查看完整题目与答案
【单选题】旅客出国要出示护照。
A.
Passengers going abroad are required to show their identity card.
B.
Passengers going abroad are required to show their driving licence.
C.
Passengers going abroad are required to show their form.
D.
Passengers going abroad are required to show their passports.
查看完整题目与答案
【单选题】外包物流的优点有( )
A.
使货主企业集中于核心业务
B.
将有限的资源用于核心业务上
C.
企业资源得到更加有效的利用
D.
以上都对
查看完整题目与答案
【多选题】负债类账户与( )账户记录的增减方向一致
A.
主营业务收入
B.
主营业务成本
C.
营业外收入
D.
营业外支出
查看完整题目与答案
【单选题】which of the following is not a use of Standard Positioning Service?
A.
British military user
B.
Chinese civil user
C.
Japanese commercial user
D.
American scientific user
查看完整题目与答案
【单选题】原肠胚与外界相通的开口,称为( )
A.
后口
B.
胚口
C.
胚孔
D.
后孔
查看完整题目与答案
【单选题】We use TEU as the unit of the standard containers. Its length is（）.
A.
40ft
B.
20ft
C.
20m
D.
40m
查看完整题目与答案
【单选题】We wish to develop a confidence interval for the population mean. The population follows the normal distribution, the standard deviation of the population is 3, and we have a sample of 10 observations...
A.
z = 1.645.
B.
z = 1.960.
C.
t = 1.833.
D.
t = 2.262.
查看完整题目与答案
相关题目：
【多选题】发售去边境地区的车票时，应要求旅客出示国务院铁路主管部门、公安部规定的()
A.
边境居民证
B.
身份证
C.
护照
D.
边境通行证
查看完整题目与答案
【单选题】Which of the following is not a use of Standard Positioning Service?
A.
British military user
B.
Chinese civil user
C.
Japanese commercial user
D.
American scientific user
查看完整题目与答案
【单选题】原肠胚与外界相通的开孔,称为
A.
后口
B.
胚口
C.
胚孔
D.
后孔
查看完整题目与答案
【单选题】旅客出国要出示护照。
A.
Passengers going abroad are required to show their identity card.
B.
Passengers going abroad are required to show their driving licence.
C.
Passengers going abroad are required to show their form.
D.
Passengers going abroad are required to show their passports.
查看完整题目与答案
【单选题】外包物流的优点有( )
A.
使货主企业集中于核心业务
B.
将有限的资源用于核心业务上
C.
企业资源得到更加有效的利用
D.
以上都对
查看完整题目与答案
【多选题】负债类账户与( )账户记录的增减方向一致
A.
主营业务收入
B.
主营业务成本
C.
营业外收入
D.
营业外支出
查看完整题目与答案
【单选题】which of the following is not a use of Standard Positioning Service?
A.
British military user
B.
Chinese civil user
C.
Japanese commercial user
D.
American scientific user
查看完整题目与答案
【单选题】原肠胚与外界相通的开口,称为( )
A.
后口
B.
胚口
C.
胚孔
D.
后孔
查看完整题目与答案
【单选题】We use TEU as the unit of the standard containers. Its length is（）.
A.
40ft
B.
20ft
C.
20m
D.
40m
查看完整题目与答案
【单选题】We wish to develop a confidence interval for the population mean. The population follows the normal distribution, the standard deviation of the population is 3, and we have a sample of 10 observations...
A.
z = 1.645.
B.
z = 1.960.
C.
t = 1.833.
D.
t = 2.262.
查看完整题目与答案