EJU Japan · EJU Chemistry

Solutions

12 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

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85.5 g of sucrose (C $_{12}$ H $_{22}$ O $_{11}$ , molar mass 342 g/mol) is dissolved in 500 g of water. The molal freezing point depression constant of water is 1.85 K kg/mol. By how many kelvin does the f…
3.42 g of sucrose (C $_{12}$ H $_{22}$ O $_{11}$ , molar mass 342 g/mol) is dissolved in 100 g of water. The molal freezing point depression constant of water is 1.85 K kg/mol. By how many kelvin does the f…
3 g of urea (CO(NH $_{2}$ ) $_{2}$ , molar mass 60 g/mol) is dissolved in 500 g of water. The molal freezing point depression constant of water is 1.85 K kg/mol. By how many kelvin does the freezing point fal…
3 g of urea (CO(NH $_{2}$ ) $_{2}$ , molar mass 60 g/mol) is dissolved in 200 g of water. The molal freezing point depression constant of water is 1.85 K kg/mol. By how many kelvin does the freezing point fal…
17.1 g of sucrose (C $_{12}$ H $_{22}$ O $_{11}$ , molar mass 342 g/mol) is dissolved in 200 g of water. The molal freezing point depression constant of water is 1.85 K kg/mol. By how many kelvin does the f…
18 g of glucose (C $_{6}$ H $_{12}$ O $_{6}$ , molar mass 180 g/mol) is dissolved in 200 g of water. The molal freezing point depression constant of water is 1.85 K kg/mol. By how many kelvin does the freezing…
15 g of urea (CO(NH $_{2}$ ) $_{2}$ , molar mass 60 g/mol) is dissolved in 500 g of water. The molal freezing point depression constant of water is 1.85 K kg/mol. By how many kelvin does the freezing point fa…
7.5 g of urea (CO(NH $_{2}$ ) $_{2}$ , molar mass 60 g/mol) is dissolved in 500 g of water. The molal freezing point depression constant of water is 1.85 K kg/mol. By how many kelvin does the freezing point f…
50 mL of 0.2 mol/L NaCl solution is mixed with 150 mL of 0.5 mol/L NaCl solution. What is the concentration of the mixture?
100 mL of 1 mol/L NaCl solution is mixed with 400 mL of 0.2 mol/L NaCl solution. What is the concentration of the mixture?
100 mL of 0.4 mol/L NaCl solution is mixed with 200 mL of 0.2 mol/L NaCl solution. What is the concentration of the mixture?
200 mL of 0.5 mol/L NaCl solution is mixed with 300 mL of 0.1 mol/L NaCl solution. What is the concentration of the mixture?

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