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Assume you have prepared 100.0 mL of a buffer solution using 0.400 mol of acetic acid (pKa = 4.74) and 0.400 mol of sodium acetate. The pH of this buffer solution is initially 4.74. After preparing this buffer solution, you added 55.0 mL of a 1.10 M NaOH solution to your buffer to see what would happen. What will the pH of this new solution be?
draw the lewis structure for the zwitter ion of cysteine, acetylcholine, seratonin, and the carbonate ion?
If it takes 52 J of energy to warm 7.40g of water by 17°C, how much energy would be needed to warm 7.40g of water by 55 °C
A solution is prepared by dissolving 12.4 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 12.50 mL sample of this stock solution is added to 55.00 mL of water. Calculate the concentration of ammonium ions and sulfate ions ..
a jet of water with a velocity v1 striking a vane45 degrees that is moving with a velocity vo. determine the forces
By how much does the chemical potential of benzene change when the pressure exerted on a sample is increased from 100kPa to 10MPa
consider the following reactioncogh2ogin equilibrium with co2gh2kc102 at 500 ka reaction mixture initially contains
Calculate the planar densities in ions per square nanometer on the (1 1 1) and (1 1 0) planes for (a) NiO and (b) NaCl. Ionic radii are Ni2+ = 0.078 nm and O2-=0.132nm, Na+=0.098nm, and Cl-=0.181nm
A 250 g yo-yo is swung on the end of a50 cm string at a constant speed of 4 m/s. What is the centripetal force acting on the yo-yo?
A 0.2678g sample of an unknown acid requires 27.21mL of 0.1164 M NaOH for neutralization to a phenolphthalein endpoint. There are 0.35mL of 0.1012 M HCl used for back-titration. What is the molar mass of the unknown acid
If this cell is at standard conditions (Cu2+ and Al3+ solutions 1.0 M and 25 degrees celsius), what is the spontaneous redox reaction and the expected cell potential. Which metal serves as the cathode? Write the half-reaction that occurs at the ca..
Why is the iodine added. What is the role of the magnesium in this reaction. Why is the 3-phenylpropyl-bromide mixed with anhyrous diethyl ether. What does the dry ice do. What does the HCl do
A is allowed to come in contact with substance B. B has a mass of 46.28 grams and its initial temperature is 86.5oC. These two substances reach thermal equilibrium at a temperature of 64.2oC. If the specific heat capacity of substance B is 1.17 J/..
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