Answer : The rate law for the following mechanism is ![Rate=k'[A]^2[B]](https://tex.z-dn.net/?f=Rate%3Dk%27%5BA%5D%5E2%5BB%5D)
Explanation :
Rate law : It is defined as the expression which expresses the rate of the reaction in terms of molar concentration of the reactants with each term raised to the power their stoichiometric coefficient of that reactant in the balanced chemical equation.
As we are given the mechanism for the reaction :
Step 1 :
(fast)
Step 2 :
(slow)
Overall reaction : ![2A+B\rightarrow D](https://tex.z-dn.net/?f=2A%2BB%5Crightarrow%20D)
The rate law expression for overall reaction should be in terms of A and B.
As we know that the slow step is the rate determining step. So,
The slow step reaction is,
![C+A\rightarrow D](https://tex.z-dn.net/?f=C%2BA%5Crightarrow%20D)
The expression of rate law for this reaction will be,
............(1)
Now applying steady state approximation for
, we get:
![K=\frac{[C]}{[A][B]}](https://tex.z-dn.net/?f=K%3D%5Cfrac%7B%5BC%5D%7D%7B%5BA%5D%5BB%5D%7D)
...........(2)
Now substituting equation 2 in 1, we get:
![Rate=k[A]\times K\times [A][B]](https://tex.z-dn.net/?f=Rate%3Dk%5BA%5D%5Ctimes%20K%5Ctimes%20%5BA%5D%5BB%5D)
![Rate=K\times k[A]^2[B]](https://tex.z-dn.net/?f=Rate%3DK%5Ctimes%20k%5BA%5D%5E2%5BB%5D)
![Rate=k'[A]^2[B]](https://tex.z-dn.net/?f=Rate%3Dk%27%5BA%5D%5E2%5BB%5D)
Hence, the rate law for the following mechanism is ![Rate=k'[A]^2[B]](https://tex.z-dn.net/?f=Rate%3Dk%27%5BA%5D%5E2%5BB%5D)
Potassium is a chemical element
Symbol: K
Atomic number: 19
Atomic mass: 39.0983 u ± 0.0001 u
Electron configuration: [Ar] 4s1
Melting point: 146.3°F (63.5°C)
Answer:
A feasible error could have been the removal of the sample before all water evaporated.
Explanation:
In order to determine the percentage of water in an hydrate, an experiment that could be performed is the heating of the sample until the mass does not change. If the student heated the sample an insufficient amount of time, water will be present in the sample, thus reducing the percentage reported.
Answer:
The initial volume of Ne gas is 261mL
Explanation:
This question can be answered using Ideal Gas Equation;
However, the following are the given parameters
Initial Pressure = 654mmHg
Finial Pressure = 345mmHg
Final Volume = 495mL
Required
Initial Volume?
The question says that Temperature is constant;
This implies that, we'll make use of Boyle's law ideal gas equation which states;
![P_1V_1 = P_2V_2](https://tex.z-dn.net/?f=P_1V_1%20%3D%20P_2V_2)
Where
represent the initial pressure
represent the final pressure
represent the initial temperature
represent the final temperature
![P_1 = 654mmHg\\P_2 = 345mmHg\\V_2 = 495mL](https://tex.z-dn.net/?f=P_1%20%3D%20654mmHg%5C%5CP_2%20%3D%20345mmHg%5C%5CV_2%20%3D%20495mL)
Substitute these values in the formula above;
![654 * V_1 = 345 * 495](https://tex.z-dn.net/?f=654%20%2A%20V_1%20%3D%20345%20%2A%20495)
![654V_1 = 170775](https://tex.z-dn.net/?f=654V_1%20%3D%20170775)
Divide both sides by 654
![\frac{654V_1}{654} = \frac{170775}{654}](https://tex.z-dn.net/?f=%5Cfrac%7B654V_1%7D%7B654%7D%20%3D%20%5Cfrac%7B170775%7D%7B654%7D)
![V_1 = \frac{170775}{654}](https://tex.z-dn.net/?f=V_1%20%3D%20%5Cfrac%7B170775%7D%7B654%7D)
![V_1 = 261.123853211](https://tex.z-dn.net/?f=V_1%20%3D%20261.123853211)
(Approximated)
<em>The initial volume of Ne gas is 261mL</em>
Holes in volcanic rocks illustrates a low pressure and rapid cooling environment(surface of the earth).
Explanation:
Holes in rocks are usually found in a special type of volcanic rock called pumice. The holes signifies a melt that has a lot of dissolved gases in them and they solidify rapid under surface temperature.
- Pockets of holes found in some rocks are as a result of trapped gases in cavities of a solidifying magma.
- The magma must erupt explosively so that the gases will not have enough time to escape.
- During an extrusive magma activity, the low pressure allows for dissolved gases to collects in cavities and magma cools rapidly around them due to the low surface temperature.
- The cavities left behind when the gases escape is the hole formed in volcanic rocks.
Learn more:
volcanic eruptions brainly.com/question/1820994
lava volcanic dome brainly.com/question/12426233
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