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Two 20.0 mL samples, one 0.200 M KOH and the other 0.200 M CH3NH2, were titrated with 0.100 M HI. What is the volume of added acid at the equivalence point for each titration? Predict whether the pH at the equivalence point is acidic, basic, or neutral. Predict which titration curve will have the lower initial pH.
A buffer that contains 0.500 M of acid, HY and 0.274 M of its conjugate base Y-, has a pH of 5.14. What is the pH after 0.0457 mol of Ba(OH)2 are added to 0.670 L of the solution
In a half-life decay process, start with 4.00 mCi of material having a half life of 25 mins. Without any detailed calculations, approximately how many mCi of this isotope would be remaining after 2 hours and 10 mins
An electron in the n = 4 level of an H atom emits a photon of wavelength 97 nm. To what energy level does the electron move?
Does FADH2 have a thermodynamic tendency to reduce coenzyme Q at pH 7. Explain why.
Lithium will react with oxygen in a pressurized container to produce solid lithium oxide at 25°C. If 0.125 g Li(s) is placed in a 0.450 L container filled with oxygen at 1.85 atm, determine the final pressure inside the container
How many valence electrons does one molecule of aspartame have? What are the bond angle measurements of aspartame?
The activation energy of a certain reaction is 47.9 kJ/mol. At 27 Celsius, the rate constant is 0.0120 s^-1. At what temperature in degrees Celsius would this reaction go twice as fast
An experiment for a new asthma medication was set up into two groups. Group one was given the new drug for asthma, while group two was given a sugar pill. The sugar pill serves as a(n).
What effect would placing a charged group in the interior of a protein have on its conformational stability
When M2S3(s) is heated in air, it is converted to MO2(s). A 3.700-g sample of M2S3(s) shows a decrease in mass of 0.207 g when it is heated in air.
A chemist wishes to determine the concentration of CrO42- electrochemically. A cell is constructed consisting of a saturated calomel electrode (SCE) and a silver wire coated with Ag2CrO4. The ° value for the following half reaction is +0.446 V rel..
Zinc has two isotopes. Zn-64 has an atomic mass of 63.9292amu and Zn-72 has an atomic mass of 71.9278amu. Its average atomic mass is 65.38amu. Calculate the abundance, in percent, of Zn-64.
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