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13 Dec 2019
PLEASE ANSWER ALL PARTS AND SHOW THE WORK CLEARLY.
2. A solution containing 2.00 g of an unknown substance in 50.0 g of cyclohexane freezes at 1.05°C. The normal freezing point of cyclohexane is 6.60°C and Kf = 20.4 °C/m. Both substances are molecular.
a. What is the value of i? __________
b. Calculate the molality of the solution using âT = Kf ⢠m ⢠i. Show all work.
c. The units of molality are moles/kg. Moles of what over kilograms of what? Be more specific than solute and solvent â label the compounds!
Moles of ________ over kilograms of _______
d. How many moles of the unknown substance are in this solution? Show all work.
e. What is the molar mass of the unknown substance? Show all work
PLEASE ANSWER ALL PARTS AND SHOW THE WORK CLEARLY.
2. A solution containing 2.00 g of an unknown substance in 50.0 g of cyclohexane freezes at 1.05°C. The normal freezing point of cyclohexane is 6.60°C and Kf = 20.4 °C/m. Both substances are molecular.
a. What is the value of i? __________
b. Calculate the molality of the solution using âT = Kf ⢠m ⢠i. Show all work.
c. The units of molality are moles/kg. Moles of what over kilograms of what? Be more specific than solute and solvent â label the compounds!
Moles of ________ over kilograms of _______
d. How many moles of the unknown substance are in this solution? Show all work.
e. What is the molar mass of the unknown substance? Show all work
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