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A sealed flask contains 0.45g of water at 28 °C. The vapor pressure of water at this temperature is 28.36 mmHg. Explain what is the minimum volume of the flask in order that no liquid water is present in the flask?
What is the wavelength of light whose energy is 1000.4 J?
Although it might not be the best choice, a student prepares a buffer using HN3 and NaN3 solutions. Find the approximate pH of the solution s/he made by mixing 0.150L of 0.800M HN3 with 0.200L of 0.25 M N3^-
The enthalpy change for the combustion of monoclinic sulfur to CO2 is -9.376 kJ/g. Under the same conditions, the combustion of rhombic sulfur to CO2 is -9.293 kJ/g.
Carbonic acid is an intermediate step in the transport of CO2out of body. If the pH of blood is 7.4, what percent is carbonic
Assuming the various solutions are used without dilution with water,how would you prepare 50ml of a buffered medium to keep pH essentially constant at 5.40 in an enzyme experimement in which acid will be produced?
A 25.0 g piece of aluminum is dropped into a beaker of water. The temperature of the aluminum drops from 94 degrees C to 67 degress C. Explain what quantity of heat energy did the piece of aluminum give off
What is the concentration of N2 gas at equilibrium when the concentration of NO2 is twice the concentration of O2 gas
Determine the mass of H 2 O in the flask and it's the true volume at 20° C?(at 20°C the Density g/mL=0.9982071,20°C the volume of 1g of water (mL) corrected for buoyancy is 1.0029 )
A swan can float on a lake with only 33% of its volume below the surface. What is the average density of the swan
The vapor pressure of ethanol at 34.7 ºC is 100.0 mm Hg as well as the heat of vaporization of ethanol is? Hvap=38.6kJ/mol. Explain what is the vapor pressure of ethanol in mm Hg at 65.0 ºC
what mass of sucrose should be combined with 537 ml of water to make a solution with an osmotic pressure of 8.55 atm at
Needed to synthesize the ester, butyl butanoate, which is responsible for the scent of the pineapple in the lab. Depict the skeletal structure of the indicated species below you would use to make yours cent.
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