Answer:
Molar concentration is 0.050 M
Explanation:
Osmotic pressure -
Osmotic pressure is pressure applied to stop the flow of solvent across a semipermeable membrane, from its high concentration to its low concentration , it is a type of colligative property , i.e. , it depends on the number of moles of solute.
Osmotic pressure can be calculated from the formula -
π = CRT
π = Osmotic pressure ( in atm )
C = molarity of the solution
R = universal gas constant ( 0.082 L.atm / K.mol )
T = temperature ( Kelvin )
From the question ,
π = 945 torr
since,
760 torr = 1 atm
1 torr = 1 / 760 atm
945 torr = 1 / 760 * 945 atm
945 torr = 1.24 atm
Temperature = T = 28°C
(adding 273 To °C to convert it to K)
T = 28 + 273 = 301 K
Using the equation of osmotic pressure,
π = CRT
C = π / RT
putting the
C = 1.24 atm / 0.082 L.atm / K.mol * 301 K
C = 1.24 / 24.68
C = 0.050 M
Hence,
The Molar concentration is 0.050 M.
Answer: True. The three factors are as stated above
Answer:
The possible valances can be determined by electron configuration and electron negativity
Good Luck even though this was asked 2 weeks ago
Explanation:
All atoms strive for stability. The optima electron configuration is the electron configuration of the VIII A family or inert gases.
Look at the electron configuration of the nonmetal and how many more electrons the nonmetal needs to achieve the stable electron configuration of the inert gases. Non metals tend to be negative in nature and gain electrons. ( They are oxidizing agents)
For example Florine atomic number 9 needs one more electron to reach a valance number of 8 electrons to equal Neon atomic number 10. Hence Flowrine has a valance of -1
Oxygen atomic number 8 needs two more electrons to reach a valance number of 8 electrons to equal Neon atomic number 10. Hence Oxygen has a valance charge of -2.
Non metals with a low electron negativity will lose electrons when reacting with another non metal that has a higher electron negativity. When the non metal forms an ion it is necessary to look at the electron structure to determine how many electrons the element can lose to gain stability.
For example Chlorine which is normally -1 like Florine when it combines with oxygen can be +1, +3, + 5 or +7. It can lose its one unpaired electron, or combinations of the unpaired electron and sets of the three pairs of electrons.
Hello:
In this case, we will use the Clapeyron equation:
P = ?
n = 8 moles
T = 250 K
R = 0.082 atm.L/mol.K
V = 6 L
Therefore:
P * V = n * R * T
P * 6 = 8 * 0.082* 250
P* 6 = 164
P = 164 / 6
P = 27.33 atm
Hope that helps!
Answer:
At the global scale, they are a significant source of emitted carbon, contributing to global warming which could lead to biodiversity changes. ... The consequence of repeated burns is detrimental because it is a key factor in the impoverishment of biodiversity in rain forest ecosystems.
