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Acetone, C3H6O, and ethyl acetate, C4H8O2, are organic liquids often used as solvents. At 30 degrees C, the vapor pressure of acetone is 285 mmHg and the vapor pressure of ethyl acetate is 118 mmHg. The solution is prepared at 30 degrees C by dissolving 31.5 g of acetone in 17.0 g of ethyl acetate?
What is the mole fraction of each component in the vapor at 30 degrees C?
How many milliliters of 1.50 M H2SO4 are needed to neutralize 50.0 g of NaOH?
cortisone is a steroid used to treat joint inflammation. each cortisone molecule contains 21 atoms of carbon plus
Why are some covalent bonds polar and others aren't? Understand why the covalent bonds of water are polar and those in the hydrogen molecule (H2) are non-polar.
Calculate the surface area for a 35.0mg sample of this material. 3. A 10.0-mL sample of contaminated water had 7.748mg of mercury in it. After treatment with 10.0mg of the new spongy material, 0.001mg of mercury remained in the contaminated water...
compound p binds with x to form the complex px. a series of solutions was prepared with the total p concentration
What is the molarity of a solution prepared by dissolving 4.92 g of calcium nitrate, Ca(NO3)2, in 250 mL of water? (The molar mass of Ca(NO3)2 is 164 g/mol.)
a 26.0-g sample of ice at -11.0degc is mixed with 123.0 g of water at 90.0degc. calculate the final temperature of the
An 11.2 liter flask at 0 degrees C contains one mole of oxygen, two moles of nitrogen and three moles of helium. What is the pressure in the flask
You are developing a purification protocol for a new, uncharacterized protein. When you apply the resin to a gel filtration column, the protein elutes with the void volume. What is the problem?
What would be the change in pressure in a sealed 10.0 L vessel due to the formation of N2 gas when the ammonium nitrite in 1.9 L of 1.250 M NH4NO2 decomposes at 25 degrees C? NH4NO2 --> N2 + 2 H2O
A certain metal oxide has the formula MO where M denotes the metal. A 36.46g sample of the compound is strongly heated in an atmosphere of hydrogen to remove oxygen as water molecules.
A catalyst lowers the activation energy of a reaction from 215 kJ to 206 kJ. By what factor would you expect the reaction-rate constant to increase at 25*C? Assume that the frequency factors
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