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Usimov [2.4K]
3 years ago
13

In lab, a dialysis bag was filled with a 10% sucrose solution and placed in an unlabeled beaker filled with clear liquid. The di

alysis bag was made of a semipermeable membrane that allowed the free passage of water, but was not permeable to sucrose. After two hours, the bag in the beaker decreased in size, lost volume, and became flaccid. Therefore, at the beginning of the experiment, the solution in the bag was ____________ compared to the solution in the beaker. g
Chemistry
1 answer:
DaniilM [7]3 years ago
5 0

Answer:

Of lower concentration or less concentrated

Explanation:

Osmosis is the movement of solvent from a region of lower concentration of solute to a region of higher concentration of solute through a semipermeable membrane in order to equalize the concentration of the solutions on both sides.

Since the membrane of the bag is semipermeable, then the fact that the bag in the beaker decreased in size, lost volume, and became flaccid indicates that the solution in the bag is of lower solute concentration than the solution in the beaker hence the movement of water molecules into the beaker by osmosis.

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iVinArrow [24]

87 is a really good grade! anyway the answer is homogeneous mixture :)

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3 years ago
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The secondary structure of a protein refers to the ___________.a. three-dimensional folded structure of the protein. b. configur
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Answer:

<u><em>(A.) three dimensional folded structure of the protein</em></u>

Explanation:

The secondary structure of a protein is a regular structure built from interactions between neighboring amino acids as the polypeptide starts to fold or coil into its functional three-dimensional shape.

The two kinds of secondary structures arising from this polypeptide 'flexing' are either the  α-helix and β-pleated structures, all of which are vital to globular and fibrous proteins.

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4 years ago
What is the molar mass of 81.50 g of gas exerting a pressure of 1.75 ATM on the walls of a pressure or 1.27 ATM on the walls of
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Here, we may apply the equation of state for an ideal gas, which is:
PV = nRT
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4 0
4 years ago
Which option describes a phase change?
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8 0
3 years ago
A voltaic cell is constructed in which the cathode is a standard hydrogen electrode and the anode is a hydrogen electrode ()= 1a
Vinvika [58]

Explanation:

It is known that relation between E_{cell}, E^{o}_{cell}, and pH is as follows.

          E_{cell} = E^{o}_{cell} - (\frac{0.0591}{n}) \times log[H^{+}]&#10;

Also, it is known that E^{o}_{cell} for hydrogen is equal to zero.

Hence, substituting the given values into the above equation as follows.

     E_{cell} = E^{o}_{cell} - (\frac{0.0591}{n}) \times log[H^{+}]&#10;

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                  -log[H^{+}] = 4.03

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As, pH = -log[H^{+}].

Thus, we can conclude that pH of the given unknown solution at 298 K is 3.5.

4 0
3 years ago
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