When 4.58 g of a nonelectrolyte solute is dissolved in water to make 725 mL of solution at 25 °C, the solution exerts an osmotic pressure of 875 torr. Required:
a. What is the molar concentration of the solution?
b. How many moles of solute are in the solution?
c. What is the molar mass of the solute?

a. 0.047 M

b. 0.6778 moles

c. 6.76 g/mol

Explanation:

The formula for osmotic pressure is:

Where:

a.) So we solve for M:

b.) We calculate the moles of solute, using the volume and molar concentration:

c.) We calculate the molar mass, using the mass and the number of moles:

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