Since the measurement is not changing, the answer is 100 mL. Hope this helps.
Answer : The value of
for the reaction is +571.6 kJ/mole.
Explanation :
According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.
According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.
The given chemical reaction is,
![\Delta H_1=-571.6kJ/mole](https://tex.z-dn.net/?f=%5CDelta%20H_1%3D-571.6kJ%2Fmole)
Now we have to determine the value of
for the following reaction i.e,
![\Delta H_2=?](https://tex.z-dn.net/?f=%5CDelta%20H_2%3D%3F)
According to the Hess’s law, if we reverse the reaction then the sign of
change.
So, the value
for the reaction will be:
![\Delta H_2=-(-571.6kJ/mole)](https://tex.z-dn.net/?f=%5CDelta%20H_2%3D-%28-571.6kJ%2Fmole%29)
![\Delta H_2=+571.6kJ/mole](https://tex.z-dn.net/?f=%5CDelta%20H_2%3D%2B571.6kJ%2Fmole)
Hence, the value of
for the reaction is +571.6 kJ/mole.
Answer : The pH of the solution is, 2.67
Explanation :
The equilibrium chemical reaction is:
![Al^{3+}+H_2O\rightarrow Al(OH)^{2+}+H^+](https://tex.z-dn.net/?f=Al%5E%7B3%2B%7D%2BH_2O%5Crightarrow%20Al%28OH%29%5E%7B2%2B%7D%2BH%5E%2B)
Initial conc. 0.450 0 0
At eqm. (0.450-x) x x
As we are given:
![K_a=1.00\times 10^{-5}](https://tex.z-dn.net/?f=K_a%3D1.00%5Ctimes%2010%5E%7B-5%7D)
The expression for equilibrium constant is:
![K_a=\frac{(x)\times (x)}{(0.450-x)}](https://tex.z-dn.net/?f=K_a%3D%5Cfrac%7B%28x%29%5Ctimes%20%28x%29%7D%7B%280.450-x%29%7D)
Now put all the given values in this expression, we get:
![1.00\times 10^{-5}=\frac{(x)\times (x)}{(0.450-x)}](https://tex.z-dn.net/?f=1.00%5Ctimes%2010%5E%7B-5%7D%3D%5Cfrac%7B%28x%29%5Ctimes%20%28x%29%7D%7B%280.450-x%29%7D)
![x=0.00212M](https://tex.z-dn.net/?f=x%3D0.00212M)
The concentration of
= x = 0.00212 M
Now we have to calculate the pH of solution.
![pH=-\log [H^+]](https://tex.z-dn.net/?f=pH%3D-%5Clog%20%5BH%5E%2B%5D)
![pH=-\log (0.00212)](https://tex.z-dn.net/?f=pH%3D-%5Clog%20%280.00212%29)
![pH=2.67](https://tex.z-dn.net/?f=pH%3D2.67)
Therefore, the pH of the solution is, 2.67
Answer:
A and D
Explanation:
I took the test, and choose both B and C and got it wrong
Answer: Cell A & Sex of rabbit
Cell A is a Sperm Which mean is a male cuz males have sperms
Explanation: Explain why the offspring os not genetically identical to either parents
I don't know how to answer that one