Calculate the mass of propylene glycol added to water
Calculate the mass of propylene glycol (C3H8O2) that must be added to 637 g of water to reduce the vapor pressure by 4.74 torr at 40°C. The vapor pressure of pure water at 40°C = 55.3 torr.
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What weight of a can be removed from a soluton that contains 6.00 grams of a in 50.0-mLs of water by a single extraction using 50.0 mLs of ligroin?
A 15.00 mL sample of this stock solution is added to 57.00 mL of water. Calculate the concentration of ammonium ions and sulfate ions in the final solution.
What mass of sucrose should be combined with 474 of water to make a solution with an osmotic pressure of 8.55 at 310 ? (Assume the density of the solution to be equal to the density of the solvent.)
Benzoic acid is a monoprotic weak acid with Ka= 6.30 x 10 to the 5 negative. What is the pH of a solution of benzoic acid that is .559M in benzoic acid and has a2.25 X 10 to the 2 negative added?
How much energy in kilojoules is required to change 47.6 g of ice at 0 degrees celsius to liquid water at the same temperature in kilocalories?
The half-life of a certain radioactive element is 1,250 years. What percent of the atoms remain after 7,500 years?
HCL acid solution is standardized using 0.502g of sodium carbonate. Find the molarity of the acid if 30.5mL are required for the titration.
Assume that we have a 100.g sample of this compound. What are the subscripts in the empirical formula of this compound?
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