Answer to Question #306008 in Chemistry for Joie

Question

A sample of 0.745 g of KCl is dissolved in 51.8 g of water. What is the percent by mass of KCl in the solution.

 

Calculate the molality of a sulfuric acid solution containing 23.2g of sulfuric acid in 192g of water. The molar mass of sulfuric acid is 98.08 g.

 

 What is the molality of a solution containing 8.82 g of Urea (NH₂)₂CO in 216g of water.

  

 A sample of 5.42 g of naphthalene is dissolved in 79.8g of benzene (C₆H₆). Calculate the percent by mass of naphthalene in the solution.

 

  Calculate the percent by mass of the solution in each of the following aqueous solutions.

a)    5.50 g of NaBr in 78.2 g of solution

b)    31.0 g of KCl in 152g of water

c)    4.5g of toluene in 29g of benzene

   

 Calculate the molality of each of the following solutions

a)    14.3 g of sucrose in 676 g of water

b)    7.20 moles of ethylene glycol (C₂H₆O₂) in 354 g of water

 

 

Calculate the molality of a 34.6 percent (by mass) aqueous solution of sodium chloride.

Answer 1

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