B,speedof light>speed of sound
Answer:
it is nanometers the third one
Explanation:
hope this helps
Answer:
Dissolving is when the solute breaks up from a larger crystal of molecules into much smaller groups or individual molecules. This break up is caused by coming into contact with the solvent. In the case of salt water, the water molecules break off salt molecules from the larger crystal lattice.
Explanation:
The answer is I have no idea really
Answer:
4.76
Explanation:
In this case, we have to start with the <u>buffer system</u>:

We have an acid (
) and a base (
). Therefore we can write the <u>henderson-hasselbach reaction</u>:
![pH~=~pKa+Log\frac{[CH_3COO^-]}{[CH_3COOH]}](https://tex.z-dn.net/?f=pH~%3D~pKa%2BLog%5Cfrac%7B%5BCH_3COO%5E-%5D%7D%7B%5BCH_3COOH%5D%7D)
If we want to calculate the pH, we have to <u>calculate the pKa</u>:

According to the problem, we have the <u>same concentration</u> for the acid and the base 0.1M. Therefore:
![[CH_3COO^-]=[CH_3COOH]](https://tex.z-dn.net/?f=%5BCH_3COO%5E-%5D%3D%5BCH_3COOH%5D)
If we divide:
![\frac{[CH_3COO^-]}{[CH_3COOH]}~=~1](https://tex.z-dn.net/?f=%5Cfrac%7B%5BCH_3COO%5E-%5D%7D%7B%5BCH_3COOH%5D%7D~%3D~1)
If we do the Log of 1:

So:

With this in mind, the pH is 4.76.
I hope it helps!