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A certain weak base has a Kb of 8.80x10-7 M. Explain what concentration of this base will produce a pH of 10.38?
c) how many grams of sodium nitride are required to inflate an air bag with nitrogen gas to a volume of 46.0 Liters at 298k and 1.0atm d) How would the amount of sodium nitride change if the same airbag were to inflate at ta much higher elevation?..
Three gases (8.00 g of methane, CH4, 18.0 g of ethane, C2H6, and an unknown amount of propane, C3H8) were added to the same 10.0-L container. At 23.0 deg C , the total pressure in the container is 3.60 atm. Calculate the partial pressure of each g..
Silver chloride usually does not ppt in solution of 1.0M NH3. However AgBr has a smaller Ksp. Will AgBr ppt form a solution containing 0.01M AgNO3, 0.01M NaBr and 1.0 M NH3? Ksp = 5 x 10^-13
how many calories are needed to raise the temperature of a 45.0 g sample of iron from 15 degree celisus to 25 degree
the ratio of the number of nuclei in the first excited nuclear energy level to the number of of nuclei for a nucleus with ε1 - ε0 = 1MeV at 25C. At what temperature is kBT on the order of ε1 - ε0. Note 1MeV = 10^6eV
During the distillation of a mixture of two miscible liquids with very different boiling points, the temperature rises to a constant reading and then drops off before returning to a higher reading. Explain the likely cause of this fluctuation in t..
You made a pH 10 buffer by combining 142 mL of 28% NH4OH with 17.5 g NH4Cl. What would have been the pH of the buffer if you had used twice the amount of NH4Cl
find pressure of c2h5oh at 355k if one mole of c2h5oh occupies 30 liters. use vander walls equation. please help not sure how to figure this out.
calculate the specific heat of a metallic element if 478 j of energy are needed to raise the temp. of a 82.73 g sample
Assign oxidation numbers to all the elementals in each of the following: a)PO3^2- b)NH4^+ c)Fe(OH)2 d)HNO3 e)Cr2O7^2-
The ionization constant of lactic acid CH3CHOHCO2H is 1.36x10^-4. If 20.0 g of lactic acid is used to make a solution with a volume of 1.00 L, what is the concentration of the hydrogen ion in this solution
what would the major product be of the reaction of 1 mole of 34-dibromoheptane with 1 mole of koh in ethylene glycol?
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