There Are Three Types Of Plate Boundaries. Which choice is NOT a Type Of Plate Boundary?
Answer:C. Thrust
Answer: 0.028 grams
Explanation:
Depression in freezing point :
Formula used for lowering in freezing point is,
![\Delta T_f=k_f\times m](https://tex.z-dn.net/?f=%5CDelta%20T_f%3Dk_f%5Ctimes%20m)
or,
![\Delta T_f=k_f\times \frac{\text{ Mass of solute in g}\times 1000}{\text {Molar mass of solute}\times \text{ Mass of solvent in g}}](https://tex.z-dn.net/?f=%5CDelta%20T_f%3Dk_f%5Ctimes%20%5Cfrac%7B%5Ctext%7B%20Mass%20of%20solute%20in%20g%7D%5Ctimes%201000%7D%7B%5Ctext%20%7BMolar%20mass%20of%20solute%7D%5Ctimes%20%5Ctext%7B%20Mass%20of%20solvent%20in%20g%7D%7D)
where,
= change in freezing point
= freezing point constant (for benzene} =![5.12^0Ckg/mol](https://tex.z-dn.net/?f=5.12%5E0Ckg%2Fmol)
m = molality
Putting in the values we get:
![0.400^0C=5.12\times \frac{\text{ Mass of solute in g}\times 1000}{354.5\times 209.0}](https://tex.z-dn.net/?f=0.400%5E0C%3D5.12%5Ctimes%20%5Cfrac%7B%5Ctext%7B%20Mass%20of%20solute%20in%20g%7D%5Ctimes%201000%7D%7B354.5%5Ctimes%20209.0%7D)
![{\text{ Mass of solute in g}}=0.028g](https://tex.z-dn.net/?f=%7B%5Ctext%7B%20Mass%20of%20solute%20in%20g%7D%7D%3D0.028g)
0.028 grams of DDT (solute) must be dissolved in 209.0 grams of benzene to reduce the freezing point by 0.400°C.
Given are the steps in the titration process:
- Clean and rinse the burette with water
- Read and record the initial burette volume.
- Fill the burette with standardized base solution
- Rinse the burette with standardized base solution
The steps in the titration process is as follows:
1.) Clean and rinse the burette with water
2.) Rinse the burette with standardized base solution
3.) Fill the burette with standardized base solution
4.) Read and record the initial burette volume
4.7 ft is equal to 55 in.
To find out how many inches are in 4.7 ft, you have to multiply 4x12 because there are 12 in in a ft. Since 4x12=48, just at the 7 in to 48 and you’ll get 55 in.
Answer:
astronomers know that sunspots are associated with magnetic fields because they can look at the spectral lines that come from the sunspots and measure by how much these lines are split.