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NH3 is a weak base (Kb = 1.8 × 10-5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.049 M in NH4Cl
Express the concentration of a 0.0850 M aqueous solution of fluoride, F-, in mass percentage and in parts per million. Assume the density of the solution is 1.00 g/mL.
How many grams of potassium chlorate decompose to potassium chloride and 527 mL of O2 at 128 degrees C and 752 torr?
What chemical tests might be used to distinguish between pentanal and 2- pentanone; between benzyl alcohol and diphenylmethanol?
prepare a schematic diagram of the work up procedure, including the column chromatography with acetylferrocene, diacetylferrocene, ferrocene
A solution is prepared by adding some solid CaF2 to water and allowing the solid to come to equilibrium with the solution. The equilibrium constant for the reaction below is Kc = 3.9x10-11.
Write a Lewis structure for each of the following molecules.
Iodine-131 is a radioactive isotope. After 5.00 days, 65.0% of a sample of 131I remains. What is the half-life of 131I? please show all details on how you got the answer im really trying to understand this
Bromine can form compounds or ions with any number of fluorine atoms from one to five. Write the formulas of all five of these species
A photon having E = 46.9 keV energy scatters from a free electron inside a metal. What is the maximum energy the electron can gain from the photon
Determine what would be the concentration of the final solution If you take a ten mili litres portion of the stock solution and dilute it to a total volume of 0.250 Litres,?
Catalysts are substances that increase the rate of reaction but can be recovered unchanged at the end of the reaction. Catalysts can be classified as either homogeneous or heterogeneous
the appropriate number of significant figures. Use leading zeros if appropriate.
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