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Analyze run-off water for the presence of a.)heavy metals; b.) Benzene-toluene-xylenes; and c.) polynuclear aromatic compounds. Which analytical method should be used in each case? Explain the choice.
Producing hydrogen atoms from H2 molecules requires 436 kJ/mol to break H-?H bonds. For the longest-?wavelength photon capable of breaking a single H-?H bond, calculate
Explain why copper (II) and iodide are incompatible in acid media and compatible in ammonia media
A buffer initially contains 0.10 mol acetic acid and 0.13 mol of sodium acetate in 1.00 L. 0.02 mol of potassium hydroxide is added to the buffer
Assuming the difference in relative boiling points of methyl acetate (bp 57ºC) and 2-butanone (bp 80ºC) is caused by the difference in their dipole moments; predict which compound has the greater dipole moment. Use a vector analysis of bond dipole..
A certain carbon-hydrogen compound contains 84.1% C by mass and the remainder is hydrogen. What is the empirical formula of the compound
What is the pH of the solution formed by adding 2.77 grams of nicotinic acid (M. Wt. = 123.11 g/mol) to 250 ml of 0.050 M NaOH? For Nicotinic Acid Ka=1.4x10-5 and Kb=7.1x10-10
What should be the normality of a sodium hydroxide solution if exactly 25.00ml are to be used to titrate 25.00of a vinegar sample containing 4.80% acetic acid
Explain why, in the 1H NMR spectrum of the product, the peak at 2.40 ppm has three times the integral value of all of the other peaks in the spectrum
A 496-mL sample of a gas at 263 oC is cooled at constant pressure until its volume becomes 241 mL. What is the new temperature in oC?
Ten grams of hamburger were added to 90 mL of sterile buffer. This was mixed well in a blender. One-tenth of a mL of this slurry was added to 9.9 mL of sterile buffer.
A metal was heat up in hot water and then put into a Styrofoam cup of water at room temperature. the specific heat was calculated.
A particular reactant decomposes with a half-life of 115 s when its initial concentration is 0.353 M. The same reactant decomposes with a half-life of 225 s when its initial concentration is 0.180 M.
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