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NH absorptions are usually much weaker and less broad than the OH absorptions. Neat, aliphatic, primary amines show two absorptions between 3400 to 3330 cm-1 and 3330 to 3250 cm-1 due respectively to asymmetrical and symmetrical stretch. Stretch at 3300 cm-1. Why do tertiary amines not absorb in this region of the spectrum?
pure nitrogen can be prepared when an aqueous solution of ammonium nitrite decomposes to form water vapor and nitrogen
RNA is readily hydrolyzed by alkali, whereas DNA is not. Why. Think of pH required for nucleophile generation
Assuming that at low pH the principle species in solution is HA and at high pH the principle species is A-, calculate the pKa of the indicator.
Which of the following types of radiation is composed of particles with a charge and mass identical to that of an electron?
This first-order reaction is 25% complete after 26 s. How much longer would one have to wait in order to obtain 99% conversion of benzoyl chloride to benzoic acid?
For a second-order reaction, what quantity, when graphed versus time, will yield a straight line. The natural log of the concentration.
10ml of 0.1m hno2 nitrous acid ka4.0x10-4is titrated with a .01m koh solution. after 10ml of the koh solution is added
Clearly explain, using calculations as necessary, how you would obtain the 5 mL of 1.5M sodium hydroxide that you need
What mass of KBr is needed to prepare 325 mL of 0.750M? How many mL of 2.50M KBr is needed to prepare this same solution
Explain why is that based on your understanding of the forces that maintain the native conformation of proteins.
Calculate the molar solubilty of BaCO3 in a 0.10 M solution of Na2CO2 (aq). Ksp (BaCO3) = 8.1 x 10^-9
Describe the major organic product(s) of this reaction. CH3C?CD + CH4 or CH3C?CCD or CH3C?CCH3 or CH3C?CD + CH3D or CD3C?CD3
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