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A 1.00 mole sample of He is placed in an empty vessel to create a pressure of .500 atm. A 48.0g quanity of methane, CH4, is added to the vessel. a) What is the mole fraction of the methane in the vessel? b) What is the total pressure in the container?
you have a 30.0 L cylinder of helium at a pressure of 132 atm and a temperature of 24 degrees Celsius. the He is used to fill balloons to a volume of 3.00 L at 1.07 atm and 29 degrees Celsius.
when 0.1875 moles of nh3 reacts completely with excess hcl 8.25 kj of energy is released as heat. what is delta h for
assume that you piper twenty milliliters of 0.350m cacl2 into a fifty milliliter volumetric flask and add di water to
A voltaic cell with Mn/Mn2+ and Cd/Cd2+ half-cells has the following initial concentrations: [Mn2+] = 0.090M and [Cd2+] = 0.060M. What is the equilibrium concentration of Cd2+
Determine the rate law and the value of k for the reaction at 25oC
What do you think is the basis for the selective response of a solar cell to certain wavelengths. Energy levels
If you dilute 28.0 of the stock solution to a final volume of 0.540 , what will be the concentration of the diluted solution?
Given that the atomic mass of carbon is given as 12.0107 g/mol, what are the approximate relative abundances of the two isotopes 12C and 13C?
Density is an example of intensive physical propery of matter. What does this statement mean?
Peonin is a red pigment found in the petals of peony flowers. Why do you think peonin is bonded to two hexoses? What monosaccharide(s) would be produced by acid-catalyzed hydrolysis of peonin?
An industrial hygiene survey has been conducted to determine whether exposure of workers to ethyl benzene (molecular weight 106) exceeded the OSHA PEL of 100 ppm.
What properties of soil and its components could be measured to determine whether two soil samples are consistent with having a common origin?
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