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Class 11 · Chemistry
→If the mole ratio of solute to solvent is 1:4, what is the mole fraction of solute?
Class 11 · Chemistry
→The mole fraction of solute is 0.1. If total moles are 40, how many moles of solvent are present?
Class 12 · Chemistry
→A water sample contains 12 mg nitrate in 2 L water. What is the approximate concentration in ppm?
Class 12 · Chemistry
→A dilute aqueous solution contains calcium ions at 40 mg L−1. Approximately how many ppm is this?
Class 12 · Chemistry
→200 mL of 0.5 M solution and 300 mL of 1.5 M solution are mixed. Total volume is additive. What is the final molarity?
Class 12 · Chemistry
→100 mL of 1 M solution and 200 mL of 3 M solution are mixed. Assume volumes are additive. What is the molarity of the mixture?
Class 12 · Chemistry
→150 mL of a 0.4 M solution is diluted with water to 600 mL. What is the new molarity?
Class 12 · Chemistry
→A solution is 2 M. Its 200 mL portion is diluted to 500 mL. What is the new molarity?
Class 12 · Chemistry
→A 20% mass-by-mass sodium chloride solution has 200 g solvent. Molar mass is 58.5 g mol−1. What is the approximate molality?
Class 12 · Chemistry
→In a 25% mass-by-mass glucose solution, solvent mass is 100 g. Molar mass of glucose is 180 g mol−1. What is the approximate molality?
Class 11 · Chemistry
→In a binary solution, the mole fraction of solvent is 0.75 and moles of solute are 3. How many moles of solvent are present?
Class 11 · Chemistry
→If the mole fraction of solute is 0.2 and the moles of solvent are 8, how many moles of solute are present?
Class 12 · Chemistry
→A 10% mass-by-mass urea solution has density 1.08 g mL−1. The molar mass of urea is 60 g mol−1. What is its approximate molarity?
Class 12 · Chemistry
→A solution has density 1.2 g mL⁻¹ and contains 20% solute by mass. If the solute molar mass is 60 g mol⁻¹, what is the molarity?
Class 11 · Chemistry
→The mole fraction of solute is 0.1. If moles of solvent are 9, how many moles of solute are present?
Class 12 · Chemistry
→An aqueous solution contains 10 mg solute in 2 L solution. Assuming density is 1 g mL−1, what is the concentration in ppm?
Class 12 · Chemistry
→50 mL ethanol is used to make 200 mL solution. If it is diluted to 400 mL, what is the new volume percentage of ethanol?
Class 12 · Chemistry
→A solution has 20 mass percent solute. If total solution mass is 150 g, what is the mass of solvent?
Class 12 · Chemistry
→If 1 L solution has mass 1200 g and contains 120 g solute, what is the mass percentage?
Class 12 · Chemistry
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