Answer:
[H₃O⁺] = 3.162 × 10⁻⁹ moles / liter
Explanation:
The pH is calculated with the formula:
pH = -lg[H₃O⁺]
From here the concentration of hydronium ion (H₃O⁺) will be:
[H₃O⁺] = ![10^{-pH}](https://tex.z-dn.net/?f=10%5E%7B-pH%7D)
[H₃O⁺] = ![10^{-8.5}](https://tex.z-dn.net/?f=10%5E%7B-8.5%7D)
[H₃O⁺] = 3.162 × 10⁻⁹ moles / liter
Principal shell shows the main energy level, in that there are some more energy levels. This is how the atomic structure is defined according to the Quantum Mechanical model of atom. So exactly why do subshells exist and all i don't know
I'm pretty sure all 4 are subatomic particles but if i had to guess i'd be Photons
Answer : The volume of stock solution needed are, 12.5 mL
Explanation :
Formula used :
![M_1V_1=M_2V_2](https://tex.z-dn.net/?f=M_1V_1%3DM_2V_2)
where,
are the initial molarity and volume of copper (II) chloride.
are the final molarity and volume of stock solution of copper (II) chloride.
We are given:
![M_1=0.100M\\V_1=250.0mL\\M_2=2.00M\\V_2=?](https://tex.z-dn.net/?f=M_1%3D0.100M%5C%5CV_1%3D250.0mL%5C%5CM_2%3D2.00M%5C%5CV_2%3D%3F)
Putting values in above equation, we get:
![0.100M\times 250.0mL=2.00M\times V_2\\\\V_2=12.5mL](https://tex.z-dn.net/?f=0.100M%5Ctimes%20250.0mL%3D2.00M%5Ctimes%20V_2%5C%5C%5C%5CV_2%3D12.5mL)
Hence, the volume of stock solution needed are, 12.5 mL