Question

A certain substance X has a normal boiling point of 140.2 $^\circ$C and a molal boiling point elevation constant $K_b = 1.87 \, ^\circ C \cdot kg \cdot mol^{-1}$. Calculate the boiling point of a solution made of 36.14 g of urea ($(NH_2)_2CO$) dissolved in 400. g of X. Be sure your answer has the correct number of significant digits.

          A certain substance X has a normal boiling point of 140.2 $^\circ$C and a molal boiling point elevation constant $K_b = 1.87 \, ^\circ C \cdot kg \cdot mol^{-1}$. Calculate the boiling point of a solution made of 36.14 g of urea ($(NH_2)_2CO$) dissolved in 400. g of X.
Be sure your answer has the correct number of significant digits.

A certain substance X has a normal boiling point of 140.2 ^∘C and a molal boiling point elevation constant Kb = 1.87 ^∘ C · kg · mol^-1. Calculate the boiling point of a solution made of 36.14 g of urea ((NH2)2CO) dissolved in 400. g of X.
Be sure your answer has the correct number of significant digits.

Added by Penny W.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Adi S

07/14/2023

Step 1

To calculate the number of moles, we can use the formula: moles = mass / molar mass The molar mass of urea ((NH2)2CO) is: (2 * 14.01 g/mol) + (4 * 1.01 g/mol) + 12.01 g/mol + 16.00 g/mol = 60.06 g/mol So, the number of moles of urea is: moles = 36.14 g / 60.06 Show more…

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A certain substance X has a normal boiling point of 140.2 °C and a molal boiling point elevation constant Kb = 1.87 °C•kg•mol^-1. Calculate the boiling point of a solution made of 36.14 g of urea ((NH2)2 CO) dissolved in 400. g of X. Be sure your answer has the correct number of significant digits. Be sure your answer has the correct number of significant digits m-c 5