Hello!
You would expect to observe
2 triplets in the ¹H NMR spectra for o-chlorotoluene.
Multiplicity observed in ¹H NMR spectra when the atom couples with a neighbor ¹H atom. The multiplicity is equal to
N+1 where N is the number of neighbor atoms.
To observe a triplet, you'll need a molecule with 2 neighbor atoms. In o-chlorotoluene (shown in the figure), only protons C and D have 2 neighbor atoms (B and D; A and C, respectively), so you'll expect to see a 2 triplets.
Have a nice day!
Answer:
D
Explanation:
The proberties of the substances that are produced are different from the properties of the original substances.
Data:
m = 7 g
ΔT = 19 °C
Cs of water = 1 cal / g °C
Formula Q = m * Cs * ΔT
Solution:
Q = (7 g) * (1 cal / g °C) * ( 19°C) = 133 cal
Answer: The ratio of conjugate base to weak acid in the buffer system is 758 : 1
Explanation:
The dissociation constant for acid =
pH = 6.34
First we have to calculate the value of
.
The expression used for the calculation of
is,

Now put the value of
in this expression, we get:


Now we have to calculate the ratio of conjugate base to weak acid in the buffer system
Using Henderson Hesselbach equation :
![pH=pK_a+\log \frac{[\text {conjugate base}]}{[Acid]}](https://tex.z-dn.net/?f=pH%3DpK_a%2B%5Clog%20%5Cfrac%7B%5B%5Ctext%20%7Bconjugate%20base%7D%5D%7D%7B%5BAcid%5D%7D)
Now put all the given values in this expression, we get:
![6.34=3.46+\log \frac{[\text {conjugate base}]}{[Acid]}](https://tex.z-dn.net/?f=6.34%3D3.46%2B%5Clog%20%5Cfrac%7B%5B%5Ctext%20%7Bconjugate%20base%7D%5D%7D%7B%5BAcid%5D%7D)
![\frac{[\text {conjugate base}]}{[Acid]}=758](https://tex.z-dn.net/?f=%5Cfrac%7B%5B%5Ctext%20%7Bconjugate%20base%7D%5D%7D%7B%5BAcid%5D%7D%3D758)
Therefore, the ratio of conjugate base to weak acid in the buffer system is 758: 1
Answer: An insulator would be made out of material unable to conduct electricity due to lack of fluid movement for electrons, such as rubber. Rubber properties not only prevents them from freely moving, but also helps electrons stay tightly bound to each other.
Hope this helps ^_^