An aqueous solution containing 35.9 g of an unknown molecular (no nelectrolyte) compound in 150.0 g of water has a freezing point of - 1.3$^{\circ} \mathrm{C}$. Calculate the molar mass of the unknown compound.

An ethylene glycol solution contains 21.2 g of ethylene glycol ($C_2H_6O_2$) in 85.4 mL of water. Determine the freezing point and boiling point of the solution . (Assume a density of 1.00 g/ mL for water.)

What mass of sucrose $(C_{12}H_{22}O_{11})$ would you combine with $5.00 \times 10^{2}$ g of water to make a solution with an osmotic pressure of 8.55 atm at 298 K? (Assume a density of 1.0 g/ mL for the solution.)

Calculate the osmotic pressure of a solution containing 18.75 mg of hemoglobin in 15.0 mL of solution at 25$^{\circ} \mathrm{C}$. The molar mass of hemoglobin is $6.5 \times 10^{4}$ g/mol.

A glucose solution contains 55.8 g of glucose ($C_6H_{12}O_6$) in 455 g of water. Determine the freezing point and boiling point of the solution.

An aqueous solution containing $35.9 \mathrm{~g}$ of an unknown molecular (nonelectrolyte) compound in $150.0 \mathrm{~g}$ of water has a freezing point of $-1.3^{\circ} \mathrm{C}$. Calculate the molar mass of the unknown compound.

An aqueous solution containing 17.5 g of an unknown molecular (nonelectrolyte) compound in 100.0 g water has a freezing point of -1.8 °C. Calculate the molar mass of the compound.

A solution contains naphthalene ($C_{10}H_8$) dissolved in hexane ($C_6H_{14}$) at a concentration of 12.35% naphthalene by mass. Calculate the vapor pressure at 25$^{\circ} C$ of hexane above the solution. The vapor pressure of pure hexane at 25$^{\circ} C$ is 151 torr.

Calculate the vapor pressure of a solution containin g 24.5 g of glycerin ($C_3H_8O_3$) in 135 mL of water at 30.0$^{\circ} \mathrm{C}$. The vapor pressure of pure water at this temperature is 31.8 torr. Assume that glycerin is not volatile and dissolves molecularly (i.e., it is not ionic ), and use a density of 1.00 g/ mL for the water.

An aqueous solution containing $17.5 \mathrm{~g}$ of an unknown molecular (nonelectrolyte) compound in $100.0 \mathrm{~g}$ of water has a freezing point of $-1.8^{\circ} \mathrm{C}$. Calculate the molar mass of the unknown compound.

A 1.2 m aqueous solution of an ionic compound with the formula $MX_2$ has a boiling point of 101.4 $^{\circ} \mathrm{C}$. Calculate the van't Hoff factor (i) for $MX_2$ at this concentration.

a. Write a brief definition for the terms Parliament, federalism, and compromise. b. How are the three principles of government the framers adopted from English government relevant to citizens today? Give details to support your answer.

Name and describe the two main types of evidence used to determine whether there is an intellectual decline as people age.

Calculate the mass of nitrogen dissolved at room temperature in an 80.0-L home aquarium. Assume a total pressure of 1.0 atm and a mole fraction for nitrogen of 0.78.