Question

The molal boiling point elevation constant K_b = 1.44 "C"kg"mol^-1 for a certain substance X. When 101. g of urea ((NH_2)_2CO) are dissolved in 950. g of X, the solution boils at 140.2 "C. Calculate the boiling point of pure X. Be sure your answer has the correct number of significant digits.

Name: The molal boiling point elevation constant Kb = 1.44 "C"kg"mol^-1 for a certain substance X. When 101. g of urea ((NH2)2CO) are dissolved in 950. g of X, the solution boils at 140.2 "C. Calculate the boiling point of pure X. Be sure your answer has the correct number of significant digits.
Uploaded: 2023-09-10T10:23:15-08:00
Duration: 1 min 43 s
Channel: Adi S
Description: The molal boiling point elevation constant Kb = 1.44 "C"kg"mol^-1 for a certain substance X. When 101. g of urea ((NH2)2CO) are dissolved in 950. g of X, the solution boils at 140.2 "C. Calculate the boiling point of pure X. Be sure your answer has the correct number of significant digits.

          The molal boiling point elevation constant K_b = 1.44 "C"kg"mol^-1 for a certain substance X. When 101. g of urea ((NH_2)_2CO) are dissolved in 950. g of X, the solution boils at 140.2 "C. Calculate the boiling point of pure X. Be sure your answer has the correct number of significant digits.

The molal boiling point elevation constant Kb = 1.44 "C"kg"mol^-1 for a certain substance X. When 101. g of urea ((NH2)2CO) are dissolved in 950. g of X, the solution boils at 140.2 "C. Calculate the boiling point of pure X. Be sure your answer has the correct number of significant digits.

Added by Dennis C.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Adi S

09/10/2023

Step 1

Calculate the molality of the solution: Molality (m) = moles of solute / mass of solvent in kg We are given that 101 g of urea (NH2)2CO are dissolved in 1000 g (or 1 kg) of solvent A. The molar mass of urea is 60.06 g/mol, so the number of moles of urea is: 101 g Show more…

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