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Use resonance forms to show the delocalization (over four carbons atoms) of the positive charge of the benzyl cation
8 ml of the HCl was used to titrate the pK_a 3.8 group; so 2 ml was enough to titrate the rest of the high pK_a group. The upper pK_a group must have begun the experiment as 80% acid form, 20% base form.
How many moles of chloride ions are there?
A 25.0 g sample of pure iron at 91°C is dropped into 57 g of water at 15°C. What is the final temperature of the water-iron mixture?
drinking water was determined in seven replicate measurements with the following results (in ppb): 1.84; 1.92; 1.94; 1.92; 1.85; 1.91; 1.97. What is the standard deviation of these measurements in ppb?
A 125 g aluminum block at an initial temperature of 95°C is dropped into a styrofoam flask containing 150 mL of water at 20°C. What is the final temperature?
Draw a two-dimensional conformational energy landscape (free energy on y-axis, conformational coordinate on x-axis) to show how a protein may become kinetically (not thermodynamically) ‘trapped' in a misfolded conformation.
How much heat is evolved when 239 g of ammonia gas condenses to a liquid at its boiling point?
the molar enthalpy of vaporization of boron tribromide is 30.5 kJ/mol and its normal boiling point is 91 degrees celsius. what is the vapor pressure of BBr3 at 27 degree celsius ( R=8.314 kJ/mol)?
Regarding the Human Genome Project (HGP) ~ Do you expect this sort of work to yield additional medical therapies as time goes on
If the titrant has a molarity of 0.2750 M and there are 25.00 mL of analyte present, what is the molarity of the analyte?
Methane gas is compressed from 22. L to 2.5 L at a constant temperature. The final pressure is 18.1 atm. What was the original pressure?
Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.110 M HClO(aq) with 0.110 M KOH(aq).
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