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Nostrana [21]
3 years ago
10

Approximately 1.0g of caffeine will dissolve in 28ml of methylene chloride and in 46ml of water. calculate the distribution coef

ficient of caffeine in this solvent system.
Chemistry
1 answer:
suter [353]3 years ago
7 0
<span>K D = 1.0g/ 28 ml 0.0357
   
-------------- = ---------- = 1.65
     
1.0 g/46 ml 0.0217
   
is the distribution coefficient of caffeine in this solvent system</span>
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Which Step In the nitrogen cycle is accelerated at the beginning of the eutrophication process
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3 years ago
Classify each amino acid according to whether its side chain is predominantly protonated or deprotonated at a pHpH of 7.40.7.40.
Zepler [3.9K]

Answer: His and Lys are deprotonated but Asp will be protonated.

Explanation:

As the pH is given as 7.4 and pK of His is given as 6.00. There will occur a positive charge on His when it's pH < pK therefore, it is neutral at the given pH.

As the pK value of Lys is 10.53 that is greater than the pH of 7.40. Therefore, charge on Lys is positive.

As the pK value of Asp is 3.65 which is less than the pH value of 7.40. Hence, Asp has a negative charge.

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3 0
4 years ago
How is data not actually obtained from the experiment represented in a line graph?
vfiekz [6]

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with a double line

8 0
3 years ago
7. A gas has a volume of 300 mL at 300 mm Hg. What will its volume be if the pressure is changed to 500 mm Hg?​
USPshnik [31]

Answer:

The volume is

<h2>180 mL</h2>

Explanation:

In order to solve for the volume we use the formula for Boyle's law which is

<h3>P _{1}  V _{1} = P _{2}V _{2}</h3>

where

P1 is the initial pressure

V1 is the initial volume

P2 is the final pressure

V2 is the final volume

Since we are finding the final volume we are finding V2

Making V2 the subject we have

<h3>V _{2}  = \frac{P _{1}  V _{1}}{P _{2}  }</h3>

From the question

P1 = 300 mmHg

V1 = 300 mL

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Substitute the values into the above formula and solve for the final volume obtained

That's

<h3>V _{2} =  \frac{300 \times 300}{500}  \\  =  \frac{90000}{500}  \\  =  \frac{900}{5}</h3>

We have the final answer as

<h3>180 mL</h3>

Hope this helps you

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4 years ago
Defined as the negative logarithm of the concentration of OH-​
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Answer:

As with the hydrogen-ion concentration, the concentration of the hydroxide ion can be expressed logarithmically by the pOH. The pOH of a solution is the negative logarithm of the hydroxide-ion concentration. pOH=−log[OH−] The pH of a solution can be related to the pOH.

4 0
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