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Assuming an atmospheric pressure of 1 atmosphere, how cold does it have to be to keep your lighter from working? (i.e. At what temperature is the pressure of butane equal to 1 atmosphere?)
In case you've forgotten the value of DHvap, at 27 °C the vapor pressure of isobutane is 2,775 torr and at -3 °C it is 1050 torr, so you can figure it out again.
calculate the number of molecules present in each of the following samples.
The printed label on a bottle of commercial vinegar states that the acetic acid concentration is 5%. (a) If the manufacturer had reported two significant figures int he concentration, what would the percentage range be so that all values would rou..
How much heat is required to convert 27.0 grams of ethanol at 28 degrees celcius to the vapor phase at 78 degrees celcius?
What mass of sucrose should be combined with 493 g of water to make a solution with an osmotic pressure of 9.00 atm at 320 K? (Assume the density of the solution to be equal to the density of the solvent.)
A beaker with 115 of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 . A student adds 9.00 of a 0.430 solution to the beaker. How much will the pH change? The ..
How many molecules of actin can a muscle cell hold. Given: cell is spherical and has no other components with a diameter of 50 micrometers. Diameter of actin is 3.8 nanometers.
A particular coal contains 2.92% sulfur by mass. When this coal is burned, the sulfur is converted into sulfur dioxide gas. The sulfur dioxide gas then reacts with calcium oxide to form solid calcium sulfite
The wavelength corresponding to threshold frequency to tungsten surface is 230nm . Calculate the kinetic energy of the photoelectron ejected from the surface of tungsten metal.
The compound K2SiO 3 • χH2O is a hydrated crystal. It is analyzed for percent water in a procedure similar to the laboratory assignment with barium chloride
Explain Buffer Solution and Henderson-Hasselbalch H-H, What is the pH of a solution prepared by mixing 50.00mL of 0.10 M NH3 with 25.00mL of 0.10 M NH4Cl? Assume that the volume of the solutions are additive and that Kb= 1.8 x 10 -5 for NH3.
A gas occupies 4.04 L at 860 torr and 10C. What volume will it fill if the pressure is changed to 731 torr and the temperature is raised to 43 0C?
how many liters of hydrogen are obtained from the reaction of 4 g calcium with excess water, at 37 Celsius and 0.962 atm?
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