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ddd [48]
3 years ago
14

When the isotonic saline solution described in part A is connected to an unknown solution via a semipermeable membrane, the unkn

own solution level drops. Based on this information, what can be said about these two solutions?
A) The two solutions have the same concentration.
B) The unknown solution had the lower concentration.
C) The unknown solution had the higher concentration.
Chemistry
1 answer:
ozzi3 years ago
3 0

B. The unknown solution had the lower concentration.

Explanation:

Osmosis is a phenomenon in which the molecules of the solvent has a tendency to move through a membrane which is semipermeable from lower concentrated side to the higher concentration side, so that the concentrations on both sides of the membrane must be equal.

So the unknown solution may have lesser concentration than the isotonic solution so that molecules of that solution move from less concentrated side to the more concentrated side, so its level drops.

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The number of atoms present in 2.5 mole of triatomic gas is equivalent to ​
RUDIKE [14]

Answer: 1.41725 X 10^{24} atoms

Explanation:

One male of any gas containing no. of atoms$=6.023\times10^{23}$

2.5 moles of gas containing no. of atoms$=2.5\times6.023\times10^{23}$$=15.0575\times10^{23}$

The given gas is triatomic gas. Hence

No. of atoms$=3\times15.075\times10^{23}$

$=14.1725\times10^{23}$\\$=1.41725\times10^{24}$

6 0
3 years ago
Identify the three basic ingredients used in glass and give an example of each​
kirill [66]

Answer:

Sand (SiO2 silica) In its pure form it exists as a polymer, (SiO2)n.

Soda ash (sodium carbonate Na2CO3) ...

Limestone (calcium carbonate or CaCo3) or dolomite (MgCO3)

Explanation:

I am pretty sure you know what sand is, Soda ash is a fine white colored powder that is extracted from the ashes of plants growing in sodium rich soils. Limestone is is a common type of carbonate sedimentary rock.  

4 0
3 years ago
The first person who suggested that matter was made up of atoms was the Greek philosopher ____________________ .
abruzzese [7]

Answer:

Democritus

Explanation:

4 0
3 years ago
Read 2 more answers
For alkyl halides used in SN1 and SN2 mechanisms, rank the leaving groups in order of reaction rate. You are currently in a rank
Alex777 [14]

Answer:

Iodide> Bromide > chloride > flouride

Explanation:

During a nucleophilic substitution reaction, a nucleophilie replaces another in a molecule.

This process may occur via an ionic mechanism (SN1) or via a concerted mechanism (SN2).

In either case, the ease of departure of the leaving group is determined by the nature of the C-X bond. The stronger the C-X bond, the worse the leaving group will be in nucleophilic substitution. The order of strength of C-X bond is F>Cl>Br>I.

Hence, iodine displays the weakest C-X bond strength and it is thus, a very good leaving group in nucleophillic substitution while fluorine displays a very high C-X bond strength hence it is a bad leaving group in nucleophilic substitution.

Therefore, the ease of the use of halide ions as leaving groups follows the trend; Iodide> Bromide > chloride > flouride

4 0
3 years ago
What is the bond angle between the hydrogen atoms in an ammonia (NH₃) molecule?
dimulka [17.4K]
There are 4 electron pairs (3 bonding and 1 lone pair) so the angle is 107 degrees. The 4 electron pairs are repelled to give a tetrahedral arrangement but the molecule has a pyrimidal shape due to the lone pair.
3 0
3 years ago
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