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Calculate the pH of a 1.39x10^-2 M solution of the decongestant ephedrine hydrochloride if the pKb of ephedrine (its conjugate base) is 3.86
Electrons are ejected from sodium metal by any light that has a wavelength shorter than 544 nm. What is the kinetic energy of an electron
a mass of 2.50 g of hydrated copper sulfate is placed in a crucible and heated. On hesting, 1.59 g of white anhydrous copper sulfate is left behind. determine the ratio of water to copper sulfate.
What volume 0.100 M NaOH will react completely with 25.00 mL of 0.100 M HCl?
Determine how many grams are there in 4.5+10 22 molecules of Barium nitrate and determine what is the molar mass of a gas ?
What is the difference between a constitutional isomer and a geometric isomer.
what is the total number of electron domains for a molecule having trigonal pyrmidal molecular geometry such as NH3
why is it easier to analyze a mixture of atomic species by absorption spectroscopy than it is to analyze a mixture of molecular species?
How many grams of NaCl must be added to 250g water to lower the vapor pressure by 1.30 mm Hg at 40 degrees C assuming complete dissociation?
Pesticide concentrations in the Rhine River between Germany and Grancn between 1969 and 1975 averaged 0.55 mg/L of C6Cl6, 0.06 mg/L of C12H8Cl60 and 1.02 mg/L of C6H6Cl6.
Number of protons & the number of neutrons in the nucleus of the element boron and potassium and the number of electrons in their 1st & 2nd quantum shells?
What is the pH of a buffer prepared by adding 0.45 mol of the waek acid HA to 0.608 mol of NaA in 2.00 L of solution? The dissociation constant Ka of HA is 5.66e-7
The unknown solution is composed of 50.0 g of nitrobenzene and 5.00 mL of the liquid unknown. Freezing point for nitrobenzene is 5.20 degrees C
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