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A 140.0-\,mL solution contains 2.00g of sodium benzoate and 2.53g of benzoic acid. Calculate the \rm pH of the solution.
water as a solvent for TLC of amino acids have opposed to a 90:7:3 acetate/water/propanioc acid?
Calculate the volume of 1M solution of HCl needed for 1 unit shift of the pH of thhe following solutions:
ethanol reacts with tosylate/nucleophile and the following: Hydroxide, cyanide, bromide, sodium propoxide and ammonia. What are the products from each
Calculate the pH of the 0.20 M NH/0.26 M NHCl buffer. What is the pH after the addition of 20.0 mL of 0.050 M NaOH to 90.0 mL of the buffer solution? The Kb of ammonia is 1.8 x 10-5.
A gas occupies a volume of 458 mL at a pressure of 1.01 kPa and a temperature of 295 K. When the pressure is changed, the volume becomes 477 mL.
In which compound does sulfur have the highest oxidation number a)Na2S2O3 b)NaHS c)H2S d)KHSO3 e) CuSO4
A mixture of Ar and N2 gases has a density of 1.416 at STP. What is the mole fraction of each gas?
How many moles of NH4NO2 would be required to form 25 grams of N2 in the following reaction
Calculate the pH at the first equivalence point. d) How many mL base, total, must be added to achieve the 2nd equivalence point?
The electron in the n = 5 level of a hydrogen atom emits a photon with a wavelength of 1280 nm. To what energy level does the electron move?
Oleum or fuming sulfuric acid available commercially in concentrations ranging from 20 to 99.9% sulfur trioxide. Discuss at least three potentially hazardous features associated with concentrated sulfuric acid.
Calculate the theoretical mass of solid formed. If the reaction in question 1 has 91.2%yield, calculate the actual mass of solid formed
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