皮皮学，免费搜题
登录
搜题
【简答题】
Ozone is found not only naturally in the atmosphere but it is also used as a strong oxidizing agent in water treatment. One way to measure the ozone concentration in water is through its absorption of ultraviolet light. A solution dissolved ozone in water gives a percent transmittance of 90% when measured at 258 nm and using a sample holder that has a path length of 4.00 cm. The molar absorptivity of ozone at 258 nm is known to be 2950 L/ molNaN. a) What is the absorbance of this sample, and what is the concentration of ozone in the sample? b) If no other absorbing species are present in the sample, what concentration of ozone would be expected to give and absorbance of 0.100 under these conditions?
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
【简答题】二极管电路及二极管伏安特性曲线如下图所示，R分别为2kΩ、500Ω，试用图解法求I D 、U D 。
【单选题】如图所示，直线l 1 ，l 2 ，l 3 的斜率分别为k 1 ，k 2 ，k 3 ，则 [ ]
A.
k 1 ＜k 2 ＜k 3
B.
k 3 ＜k 1 ＜k 2
C.
k 1 ＜k 3 ＜k 2
D.
k 3 ＜k 2 ＜k 1
【简答题】如图为K物质在水中的溶解度曲线．X、Y两点分别表示K物质的两种溶液（溶剂质量都是100g）．据图分析：Y点表示K物质的______溶液（填“饱和”，“不饱和”），要使Y溶液变为X，应采取的措施为______．
【简答题】下图为K物质在水中的溶解度曲线。 X、Y两点分别表示K物质的两种溶液(溶剂质量都是100g)。据图分析：Y点表示K物质的_________溶液（填“饱和”，“不饱和”），要使Y溶液变为X，应采取的措施为_________。
相关题目：