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The minimum volume % of vapor that gives a combustible mix is called the lower flammable limit (LFL). Generally, the LFL is about half the stoichiometric mixture, the concentration required for complete combustion of the vapor in air. a.) If oxygen is 20.9% volume % of air, estimate the LFL for n-hexane, C6H14. b.) What volume (mL) of liquid n-hexane (d=0.660 g/cm^3) is required to produce a flammable mixture of hexane in 1.000 m^3 of air at STP?
A particular system is doing work on the surroundings as well as gaining heat from the surroundings. What can be said about the values of q (heat) and w (work) for this system?
Using appropriate equations, explain why combustion of fuels containing sulfur leads to acid rain.
the wavelength of the emitted photon corresponds to the difference in energy between the two energy levels. What were the principal quantum numbers of the initial and intermediate excited states involved?
Assuming no change in volume, How much will the pH of the Acetic acid change? How much will the percent ionization of the acetic acid change
Using the Henderson-Hasselbach equation, calculate the volume of 0.10 M Na2HPO4 and 0.10 M NaH2PO4 that would be required to make 100.0 mL of a 0.10 M (total phosphate concentration i.e. HPO4 + H2PO4) buffer with a pH of 6.91.
In the process, a photon of wavelength 1.28Ã-10-6 m is emitted. What was the value of the principal quantum number for the higher energy level?
If the BaSO4 residue was baked in an oven at 100C for several hours rather than air drying, what effect would this have on its mass and how would the initial concentration of H2SO4 be affected
What is the final temperature after 336J of heat energy is removed from 25.0g of Water at 19.6C
Imagine that you have a 5.50 gas tank and a 4.00 gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch.
Above what Fe2 concentration will Fe(OH)2 precipitate from a buffer solution that has a pH of 9.39? The Ksp of Fe(OH)2 is 4.87×10-17
The bed diameter is .40 m and the desired height of the bed at these minimum fluidizing conditions is 1.75m. Calculate the amount of solids needed.
Solve Virial equation (the virial equation expanded in 1/ Vm )are expansions in p and 1/Vm,respectively
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