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?

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

Four statements about aqueous solutions are given. Take the molar masses to be urea $60.0\ \text{g mol}^{-1}$ , glucose $180.0\ \text{g mol}^{-1}$ and water $18.0\ \text{g mol}^{-1}$ . One or more of them are correct. Which are correct?

One or more options are correct. Tick all the correct ones: a wrong option costs marks, and a part-right answer earns part of the marks.

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← 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?Four statements about reactions of gases are listed. Gas volumes are measured at the same temperature and pressure, and STP means 273 K and 1 atm with molar volume 22.4 L mol⁻¹. Atomic masses: H 1.0, C 12.0, O 16.0, Ca 40.0. One or more statements are correct. Which are correct? →

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