Answer:
Protons and neutrons are made up of smaller subatomic particles. When protons or neutrons get close enough to each other, they exchange particles (mesons), binding them together. Once they are bound, it takes considerable energy to break them apart.
Answer:
0.02.55M
Explanation:
Concentration = moles/ volume(L)
10mL= 0.01L
Concentration (M)= 0.0255 mol / 0.01L
Concentration (M)= 0..255M
Answer:
pH = 10.93
Explanation:
To find the pH we need to use the Henderson - Hasselbalch equation:
![pH = pKa + log(\frac{[A^{-}]}{[HA]})](https://tex.z-dn.net/?f=%20pH%20%3D%20pKa%20%2B%20log%28%5Cfrac%7B%5BA%5E%7B-%7D%5D%7D%7B%5BHA%5D%7D%29%20)
<u>Where</u>:
[A⁻]: is the conjugate base of the acid = [CH₃NH₂] = 0.55 M
[HA]: is the acid = [CH₃NH₃Cl] = 0.29 M
Since the pkb of methylamine is 3.35, the pka is:
Now, the pH is:
![pH = pKa + log(\frac{[A^{-}]}{[HA]}) = 10.65 + log(\frac{0.55}{0.29}) = 10.93](https://tex.z-dn.net/?f=%20pH%20%3D%20pKa%20%2B%20log%28%5Cfrac%7B%5BA%5E%7B-%7D%5D%7D%7B%5BHA%5D%7D%29%20%3D%2010.65%20%2B%20log%28%5Cfrac%7B0.55%7D%7B0.29%7D%29%20%3D%2010.93%20)
Therefore, the pH of the buffer solution is 10.93.
I hope it helps you!
Answer:
The element that has 16 electrons, 16 protons, and 16 neutrons is sulfur (S)
Explanation:
The atomic number tell you the number of protons.
The atomic configuration tell you the number of electrons.
The mass number minus the protons tell you the number of neutrons.
Answer:
The answer to your question is given below
Explanation:
1. Data obtained from the question include:
Hydrogen ion concentration, [H+] = 1x10^-9M
pH =..?
pH = - log [H+]
pH = - log 1x10^-9
pH = 9
2. Data obtained from the question include:
pOH = 3
pH =.?
Recall:
pH + pOH = 14
pH + 3 = 14
Collect like terms
pH = 14 - 3
pH = 11
3. Data obtained from the question include:
Hydroxide ion concentration, [OH-] = 1x10^-2M
pH =..?
First, we shall determine the pOH. This is illustrated below
pOH = - Log [OH-]
pOH = - Log 1x10^-2
pOH = 2
Finally, we can obtain the pH as follow:
pH + pOH = 14
pOH = 2
pH + 2 = 14
Collect like terms
pH = 14 - 2
pH = 12
4. Data obtained from the question include:
pOH = 7
pH =.?
Recall:
pH + pOH = 14
pH + 7 = 14
Collect like terms
pH = 14 - 7
pH = 7
