The rate of hydrolysis of a compound A is measured in mol/(L × h). Express the rate of 0.61 mol/(L × h) in g/(mL × s). The molar mass of compound A is 280 g/mol.数值题

题目图片

登录即可查看完整答案

我们收录了全球超50000道真实原题与详细解析,现在登录,立即获得答案。

类似问题

A drug with concentration 0.90 M decomposes via acid-catalysed hydrolysis with a rate constant of 0.031 M−1 h−1. What is the shelf-life of this drug in hours? Report your answer to 2 significant figures.

A new drug candidate has been developed and the rate constant for its base-catalysed hydrolysis has been was found to vary with temperature. The rate constant at 25 °C was determined to be 1.053 × 10-3 h-1. Which formulation and storage recommendations, of the ones listed below, are appropriate?

Consider a process where a product is formed from a reactant A via two different mechanistic pathways, characterised by rate constants k1 and k2. Which rate law correctly describes this process?

Question textConsider the decomposition reaction of hydrogen peroxide: 2 H2O2 (aq) → 2 H2O (l) + O2 (g) The reaction cannot occur in one step corresponding to the overall balanced equation. If it did, the rate law would demonstrate that reaction to be second order with respect to H2O2 since the coefficient of the H2O2 in the balanced equation is 2. A reaction mechanism can be constructed which accounts for the rate law and for the experimental detection of the IO− (hypoiodite) ion. This mechanism consists of two bimolecular elementary steps: Step 1  H2O2 (aq) + I− (aq) → H2O (l) + IO− (aq) k1 Step 2  H2O2 (aq) + IO− (aq) → H2O (l) + I− (aq) + O2 (g) k2 Each of the elementary steps describes what actually happens at the molecular level. How do we explain the observed rate dependence? Concentration of the iodide ion [I−] appears in the rate law. Therefore, the elementary step with I− (step 1) Answer 1 Question 5[select: , is, is not] a rate-determining step and Answer 2 Question 5[select: , k1 ≪ k2, k1 ≫ k2, k1 = k2] Therefore, the overall rate of decomposition is completely controlled by the Answer 3 Question 5[select: , first, second] step and Answer 4 Question 5[select: , k = k1, k = k2] And that explains why the overall rate depends on [H2O2] and [I−].Check Question 5

更多留学生实用工具

加入我们，立即解锁 海量真题 与 独家解析，让复习快人一步！