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Gnoma [55]
3 years ago
12

What is the water potential of a .20 M solution of sucrose in an open beaker at 23 degrees Celsius?

Biology
1 answer:
Dmitrij [34]3 years ago
3 0

Answer:

-4.92 bars

Explanation:

<em>The water potential of a solution is the sum of the pressure potential and the solute potential of the solution. This can be mathematically expressed as;</em>

Фw = Фp + Фs, where Фw = water potential, Фp = pressure potential, and Фs = solute potential.

For a solution that is in an open beaker, the Фp = 0. hence

Фw = -Фs

Also,

Фs = iCRT, where i = number of particles the molecule will make in water (1 for sucrose), C = molar concentration, R = pressure constant (usually 0.0831 liter bar/mole K), and T = temperature (in kelvin).

In this case, i = 1, C = 0.20 M, R = 0.0831, T = 273+23

Фs = 1 x 0.20 x 0.0831 x 296 = 4.92 bars

Therefore,

Фw = -4.92 bars

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In this type of tilling practice, the farmer
erik [133]

Answer:

No tilling agriculture.

Explanation:

No tilling farming is a type of agricultural practice where new crops are grown without spreading the soil through the tillage. This is a very age old practice used by farmers to replant new crops.

The advantages of using thus technique are many. It helps to kill hundreds of insects, it also helps in protecting the soil by leaving crop residue, apart from this is increases the irrigation productivity. Which is why farmers prefer no tilling agriculture mainly because the long term benefits of this technique are many.

8 0
3 years ago
You have a 15kb plasmid. EcoRI cuts the plasmid into 7kb and 8kb pieces, and BamHI cuts the plasmid into 1kb and 14kb pieces. If
Harman [31]

Answer:

a. Bands at 1kb, 6kb and 8kb

Explanation:

The EcoRI and BamHI are the restriction enzymes which cut the DNA sequence especially a plasmid at specific sites called the restriction sites.

The restriction enzymes produces bands of specific length therefore these restriction enzymes are used to estimate the approximate length of the DNA.

In the given question, the

1. EcoRI- produces two strands of 7 kb and 8 kb

2. BamHI- produces two strands of 1kb and 14kb

This shows that the length of DNA sequence is 15kb

But when the DNA strand are digested with both the enzymes simultaneously then it will produce three bands as:

i) 14 kb can be broken down in 2 bands of 6 kb and 8 kb

ii) 1 kb band is already produced by the Bam HI.

This shows that 1+6+8= 15 kb

Thus, Option-A is correct.

5 0
3 years ago
7.
yulyashka [42]

Answer:

27.5

Explanation:

Divide 75 by 6. You get 12.5. Multiply 12.5 by 2.2 (when converting kilo to pound, you multiply by 2.2) Then, you'll get 27.5. The answer is 27.5 pounds/lbs.

6 0
3 years ago
The first place that the reabsorption of water is not automatically coupled to the reabsorption of filtered solutes occurs in th
Alina [70]

Answer:

False

Explanation:

The correct answer is false because Reabsorption of water and other filtered solutes like vitamins, sodium e.t.c. take place in the proximal convoluted tubules.

Reabsorption is when water and solutes in the PCT are removed and moved back into the blood and it's a process that take place through bulk transport.

The solutes and water are transported from the PCT to the interstitium and then move into peri-tubular capillaries and reabsorption in PCT is isosmotic i.e solutes have the same osmotic pressure.

6 0
3 years ago
If the circumference of a circle is changed from 2 cm to 6 cm, how will the diameter change?
Alik [6]

Answer:

A. increases by a factor of 3

Explanation:

7 0
3 years ago
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