Two aqueous solutions of glucose (C₆H₁₂O₆, molar mass 180 g mol⁻¹) have molalities 1.00 mol kg⁻¹ and 3.00 mol kg⁻¹. Equal masses, 1000 g of each, are mixed. What is the molality of the mixture?

ChemistryAdvancedHigh School (11–12)Atoms and Molecules › Stoichiometry and Concentration Olympiad

Two aqueous solutions of glucose ( $\text{C}_6\text{H}_{12}\text{O}_6$ , molar mass $180\ \text{g mol}^{-1}$ ) have molalities $1.00\ \text{mol kg}^{-1}$ and $3.00\ \text{mol kg}^{-1}$ . Equal masses, $1000\ \text{g}$ of each, are mixed. What is the molality of the mixture?

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← A solid mixture of calcium chloride and sodium chloride has mass 1.695 g. It is dissolved in water, and excess silver nitrate precipitates all the chloride as AgCl, of mass 4.305 g. What is the percentage of sodium chloride in the mixture by mass? Atomic masses in g mol⁻¹: Na 23.0, Cl 35.5, Ca 40.0, Ag 108.0.Four statements about aqueous solutions are given. Take the molar masses to be urea 60.0 g mol⁻¹, glucose 180.0 g mol⁻¹ and water 18.0 g mol⁻¹. One or more of them are correct. Which are correct? →

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