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A mixture of solid NaCl and solid sucrose, C12 H22 O11, has an unknown composition. When 13.0 g of the mixture is dissolved in enough water to make 500. mL of solution, the solution exhibits an osmotic pressure of 6.85 atm at 25°C. Determine the mass percentage of NaCl in the mixture.
In the tin oxide laboratory activity, what was the color of the vapor emitted when the nitric acid was added to the tin.
the chloroform would remain as liquid in the flask after equilibrium is established between liquid and vapor chloroform? (the vapor pressure of chloroform at 20 degrees C is 0.208 atm)
A mixture of cyclopropane gas and oxygen is used as an anesthetic. Cyclopropane contains 85.7% C and 14.3% H by mass. At 50.0C and .984 atm pressure, 1.56 g cyclopropane has a volume of 1.00 L. What is the molecular formula of cyclopropane?
A solution of water at 30 degrees Celsius is placed in a freezer at a constant temperature of -8 degrees Celsius. Calculate the entropy change of the system, surroundings, and the universe.
describe how these three ions can be separated by adding NaI solution. Which will precipitate out first and last? Please solve and show EVERY step of the solution
A 12.0 gas cylinder has been filled with 5.40 moles of gas. You measure the pressure to be 5.00 atm. What is the temperature inside the tank? Express your answer numerically in degrees Celsius.
If 3.8kcal of energy is released when 1 gram of glucose is combusted, how many kcals are released when 0.689 moles of glucose are combusted
Specific rotation of α and β -D-glucose - Determine the percentage of each anomer at equilibrium.
The standard molar enthalpy change for this reaction is -1.3MJ. What is the enthalpy change when 6 moles of octane are combusted?
Suppose you want to produce 1L of 3.50M aqueous solution of H2SO4. How many grams of solute are needed to make this solution.
Calculate how many grams of phosphorus are present in 2.68 moles of phosphorus pentachloride(PCl5) and also determine the numbers of moles of chlorine are present in 3.71 grams of phosphorus pentachloride?
If the metal crystallizes in a body-centered cubic structure, which choice is closest to the atomic mass?
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