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serg [7]
4 years ago
15

A cucumber is placed in a concentrated salt solution. What will most likely happen? Select one: a. Water will flow from the cucu

mber to the solution. b. Water will flow from the solution to the cucumber. c. Salt will flow into the cucumber. d. Salt will precipitate out. e. No change will occur.
Chemistry
2 answers:
lesantik [10]4 years ago
6 0

Answer: Option (a) is the correct answer.

Explanation:

Osmosis is defined as a process in which solvent molecules pass through a semipermeable membrane from a region of less concentration to a region of more concentration. As a result, it equals the concentration on each side of the membrane.

Therefore, when a cucumber is placed in a concentrated salt solution then molecules of cucumber will travel towards the concentrated salt solution in order to balance the concentration.

Thus, we can conclude that when a cucumber is placed in a concentrated salt solution then water will flow from the cucumber to the solution.

antiseptic1488 [7]4 years ago
3 0

Answer:

a.- Water will flow from the cucumber to the solution

Explanation:

This is an example of osmosis in difference of concentration of solutions. In the salty solution there is more salt molecules than inside the cucumber. Trying to make up for the same salt concentration inside that outside the cucumber, it will tend to flow some of the water that is inside the cucumber tissues to the environment that surrounds it.

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Fe(NO3)2 not sure how to get the oxidation numbers of all elements
Elis [28]
Here are some rules:
1. The oxidation state of a free element (uncombined element) is zero.2. For a simple (monatomic) ion, the oxidation state is equal to the net charge on the ion.3. Hydrogen has an oxidation state of +1 and oxygen has an oxidation state of −2 when they are present in most compounds.

The oxidation number of Fe in  Fe(NO3)2 is +3.

4 0
3 years ago
0.450 moles of NaCl are dissolved in 95.0 mL of water. Calculate the molarity of the NaCl solution.
Anarel [89]

Answer:

0.0188 mol

Explanation:

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3 years ago
If carbon-15 has a half-life of 2.5 seconds, % of the sample would still be
kramer

Answer:

After 5 second 25% C-15 will remain.

Explanation:

Given data:

Half life of C-15 = 2.5 sec

Original amount = 100%

Sample remain after 5 sec = ?

Solution:

Number of half lives = T elapsed / half life

Number of half lives = 5 sec / 2.5 sec

Number of half lives = 2

At time zero = 100%

At first half life = 100%/2 = 50%

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Thus after 5 second 25% C-15 will remain.

8 0
4 years ago
Keeping water clean. Keeping water supplies clean requires regular measurement of levels of pollutants. The measurements are ind
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8 0
3 years ago
A rectangular block of copper metal weighs 1896 g. The dimensions of the block are 8.4 cm by 5.5 cm by 4.6 cm. From this data, w
Fed [463]

Answer:

Density = 8.92 g/cm³

Explanation:

Density shows the relation of the mass and volume of a determined object. We have this deffinition:

Density = mass / volume

First of all, we calcualte the volume of the block of copper metal, with the data given:

8.4 cm . 5.5 cm . 4.6 cm = 212.52 cm³

Now we replace at the density formula:

Density = 1896 g /212.52 cm³  = 8.92 g/cm³

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3 years ago
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