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0.2M guanidine reacting with 0.2 moles of HCl. Assume that the volume of the solution does not change.
Calculate the pH. (pKa of Guanidine = 13.6)
What is the maximum kinetic energy of an ejected electron if vanadium metal is irradiated with 258-nm light? The threshold wavelength for a vanadium metal surface is 288 nm.
Define exposure assessment, and describe the seven steps involved in an exposure-assessment strategy.
Problem- 0.12 g of compound Y dissolves in 10 ml of acetone at 25 degrees C and 0.85 g of the same compound dissolves in 10 ml of boiling acetone. What volume of acetone would be required to purify a 5.0 g sample of compound
Calculate the pH of a solution prepared by dissolving 18.32 grams of benzoic acid and 43.23 grams of sodium benzoate in water sufficient to yield 1.00 L of solution.
Explain would silver chloride which is 5.56g/cm3if it was placed on top of the ozone or in the lower mesoshpere/upper stratosphere would it stay up in the atmosphere or fall back down to earth
State the organic products of each of the following reactions show the structures of the reactants as well as products. If two stereoisomers are formed, demonstrate both and label all sterogenic centres R or S as appropriate.
Determine the intermolecular distances for the two molecules and account for their similarity or difference.
The Ka value for hydrocyanic acid is 4.9 x 10/\-10. Calculate the pH of a 0.095 M aqueous solution of HCN. The Kb value for pyridine is 1.7 x 10/\-9. Calculate the pH of a 0.050 M aqueous solution of C5H5N.
If 3.140g of ethanol is burned completely in a bomb calorimeter at 298.15 K, the heat produced is 92.82kJ. 1) Calculate delta H_combustion for ethanol at 298.15 K. 2) Calculate delta H_f for ethanol at 298.15 K.
2N2H4 (aq) + H2SO4 (aq)--> 2 N2H5+So4^-2(aq) how many grams of hydrazine can be consumed by 250.ml of 0.225 M H2SO4?
If 348 grams of K2SO4 (molar mass 174 grams) is dissolved in enough water to make 500 milliliters of solution, what are the concentrations of the potassium and sulfate ions.
You are given trhat 0.01 m aqueous solutions of each of the given solution as, C6H12O6, K3PO4, CaCl2 , NaI you jutst need to place the given solutions in order of increasing change in the freezing point of the solution.
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