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A mixture of methane and air is capable of being ignited only if the mole percent of methane is between 5% and 15%. A mixture containing 9.0 mole % methane in air flowing at a rate of 700.kg/h is to be diluted with pure air to reduce the methane concentration to the lower flammability limit. Calculate the required flow rate of air in mol/h and the percent by mass of oxygen in the product gas. (Note: air can be considered to be 21 mole % O2 and 79% N2 and to have an average molecular weight of 29.0 g/mol).
A reaction rate has a constant of 1.28/mol*s at 433 degress C and 24.0/mol*s at 533 degrees C. Determine the activation energy for this reaction.
Write a balanced overall equation for each isomer of stilbene (cis and trans)
5H2C2O4(aq) + 2KMnO4(aq) + 3H2SO4(aq) ---> 10CO2(g) + 2MnSO4(aq) + K2SO4(aq) + 8H2O(l). What is the concentraton of KMnO4 solution if 22.35mL reacts with 0.5170g of oxalic acid.
calculate the standard emf of a cell that uses the mgmg2 and cucu2 half-cell reactions at 25 degrees celsius. write the
a backpacker wants to carry enough fuel to heat 2.2 kg of water from 30 c degree to 100.0 c degree. if the fuel he
Give an example of a biological reaction in which water participates as a reactant and a reaction in which it participates as a product.
Nicotine, a component of tobacco, is composed of C, H, and N. A 12.075 mg sample of nicotine was combusted, producing 32.757 mg of CO2 and 9.391 mg of H2O. What is the empirical formula for nicotine?
What is the volume of 1.31 kg of mercury at 25 C? You can use any reliable reference to look up the density of mercury.
A solution is made up by dissolving 73 g of glucose in 966 g of water. Calculate the activity coefficient of glucose in this solution if the solution freezes at -.66 degrees C.
What must be the concentration of PO43- to just start precipitation of Ag3PO4 in a 0.10M AgNO3 solution?
A compound contains only nitrogen and hydrogen and is 87.4% nitrogen by mass. A gaseous sample of the compound has a density of 0.925 g/L at 690 torr and 110 C.
Propionic acid and methyl acetate are isomers. Which has the higher boiling point and why. Which one would have the greater rf value on TLC.
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