7. The vapor pressure of water at 25.0°C is 23.8 torr. Determine the mass of glucose...
The vapor pressure of water at 25.0ºC is 23.8 torr. Determine the mass of glucose (molar mass = 180 g/mol) needed to add to 500.0 g of water to change the vapor pressure to 23.3 torr.
Problems-Mathematical Colligative Properties Thyroxine, an important hormone that controls the rate of metabolism in the body, can be isolated from the thyroid gland. If 0.455 g of thyroxine is dissolved in 10.0 g of benzene, the freezing point of the solution is 5.144C. Pure benzene freezes at 5.444°C and has a Krof 5.12°C/m. What is the molar mass of thyroxine? 21. 19, The reaction between nitric oxide and ozone produces nitrogen dioxide and oxygen gas. The activation energy for the...
The vapor pressure of water at 25.0 degrees C is 23.8 torr. Determine the mass of glucose C6H12O6 in g is needed to add to 237.8 g of water to change the vapor pressure to 22.8 torr
Thyroxine, an important hormone that controls the rate of metabolism in the body, can be isolated from the thyroid gland. When 2.50 g thyroxine is dissolved in 55.0 g benzene, the freezing point of the solution is depressed by 0.300oC. What is the molar mass of thyroxine? (Kf for benzene is 5.12oC∙kg/mol.)
please help! is #7 right? and please help me do #8 7. The vapor pressure above a sugar-water solution at 25°C is 21.4 torr. What is the mole fraction of sugar in the solution? (assume the vapor pressure of water at 25°C is 23.8 torr) O.To = X 8. It is found that 3.90 g of benzene, C6H6, dissolved in 100.0g of a solvent lowers the freezing point to 10.0°C. The pure solvent freezes at 25°C. What is the molal...
The vapor pressure of pure water at 25.0 °C is 23.76 torr. The vapor pressure of a solution containing 5.40 g of a nonvolatile substance in 90.0 g of water is 23.32 torr. What is the molecular weight of the solute?
4.) Pure water has a vapor pressure of 31.1 torr at 30.1 °C. A solution is prepared by adding 90.8 g of unknown substance which is a nonvolatile and non-electrolyte to 375.0 g of water. The vapor pressure of the resulting solution is 29.5 torr. Calculate the molar mass of the unknown substance.
Problem #4: At 29.6 °C, pure water has a vapor pressure of 31.1 torr. A solution is prepared by adding 86.8 g of "Y", a nonvolatile non- electrolyte to 350. g of water. The vapor pressure of the resulting solution is 28.6 torr. Calculate the molar mass of Y.
Determine the vapor pressure of a solution at 25°C that contains 76.6 g of glucose (C6H12O6) in 250.0 mL of water. The vapor pressure of pure water at 25°C is 23.8 torr. Please show work...
q16 An aqueous solution containing glucose has a vapor pressure of 19.9 torr at 25°C. What would be the vapor pressure of this solution at 45°C? The vapor pressure of pure water is 23.8 torr at 25°C and 71.9 torr at 45°C. Vapor pressure torr If the glucose in the solution were substituted with an equivalent amount (moles) of NaCl, what would be the vapor pressure at 45°C? Vapor pressure torr