Answer: -
Osmosis is the process by which water molecules move from a region of high solvent concentration to low solvent concentration.
Now in any solution there are just solute and solvent.
If the amount of solvent is more in a solution then the amount of solute would be less.
Again if the amount of solvent is less in a solution then amount of solute is more.
Thus we can write that :- osmosis is the movement of water molecules from a region of low solute concentration to high solute concentration.
Answer:
I^- or Cl^-
Explanation:
A nucleophile is any reagent that donates an unshared pair of electrons to form a new covalent bond. Nucleophiles are mostly bases also. Nucleophilicity is a kinetic property, it refers to the rate at which a nucleophile replaces a leaving group from an alkyl halide.
Looking at the options, Cl^- and I^- are the best nucleophiles among the options provided in the question.
<h3>
Answer:</h3>
250.756 moles He
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Explanation:</h3>
From the question we are given;
Volume, L = 685 L
Temperature, T = 621 K
Pressure, P = 189 × 10 kPa
We are required to calculate the number of moles of the gas,
Using the Ideal gas equation,
PV = nRT, where P is the pressure, V is the volume, T is the temperature, n is the number of moles, and R is the ideal gas constant.
We can replace the known variables and constant in the equation to get the unknown variable, n.
Using ideal gas constant as 8.3145 L.kPa/K/mol
n = 250.756 moles
The moles of helium contained in the sphere is 250.756 moles
Answer:
B
Explanation:
By looking at how seismic waves change speeds as they travel
through Earth
