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Class 11 · Chemistry
→A solution has solute mole fraction 0.02. If the solvent is water, what is the approximate molality?
Class 12 · Chemistry
→A 30 percent by mass nitric acid solution has density 1.18 g mL−1. Molar mass of nitric acid is 63 g mol−1. What is its approximate molarity?
Class 12 · Chemistry
→How much water should be added to 200 mL of 0.2 mol L−1 solution to make its molarity 0.05 mol L−1?
Class 12 · Chemistry
→In what volume ratio should 1 mol L⁻¹ and 4 mol L⁻¹ solutions of the same solute be mixed to obtain a 2 mol L⁻¹ solution?
Class 12 · Chemistry
→50 mL of 5 mol L−1 acid is mixed with 100 mL of 2 mol L−1 acid. Assuming final volume is 150 mL, what is the final molarity?
Class 12 · Chemistry
→A 250 mL solution contains 0.005 g solute. If density of the solution is 1 g mL−1, what is the concentration in ppm?
Class 11 · Chemistry
→Water contains 9 ppm dissolved oxygen. What is the approximate mass of oxygen in 500 mL water?
Class 12 · Chemistry
→What is the approximate mole fraction of glucose in a 0.2 molal glucose solution?
Class 11 · Chemistry
→The mole fraction of water in a solution is 0.9. If moles of water are 9, how many moles of solute are present?
Class 12 · Chemistry
→A 0.5 mol L⁻¹ glucose solution has density 1.04 g mL⁻¹. Molar mass of glucose is 180 g mol⁻¹. What is its approximate molality?
Class 12 · Chemistry
→A 10 percent by mass sodium chloride solution has density 1.07 g mL⁻¹. Molar mass of sodium chloride is 58.5 g mol⁻¹. What is its approximate molarity?
Class 12 · Chemistry
→What is the approximate mass percentage of a 1 molal urea solution if molar mass of urea is 60 g mol⁻¹?
Class 12 · Chemistry
→A 2 mol L⁻¹ sodium hydroxide solution has density 1.08 g mL⁻¹. Molar mass of sodium hydroxide is 40 g mol⁻¹. What is its molality?
Class 12 · Chemistry
→A 20 percent by mass glucose solution has density 1.2 g mL⁻¹. If molar mass of glucose is 180 g mol⁻¹, what is its molarity?
Class 12 · Chemistry
→A solution contains 0.5 mol solute and 200 g solvent. What is the molality?
Class 12 · Chemistry
→What mass of anhydrous sodium carbonate is needed to prepare 500 mL of 0.2 M solution?
Class 11 · Chemistry
→A solution has 10 percent solute by mass. What is the mass percent of solvent in the same solution?
Class 12 · Chemistry
→What is the approximate mass percent of sodium chloride in a 2 molal sodium chloride solution?
Class 12 · Chemistry
→A 1 M glucose solution has density 1.06 g mL−1. What is its approximate molality?
Class 12 · Chemistry
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