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At what pH would the side chain of histidine exist predominately in a form that could be involved in an ionic bond? (side chain pKa=6.0) and why?
What will be the velocity of the escaping electrons under these conditions? What is the de Broglie wavelength of the escaping electrons?
H3PO4 behaves differently at different higher temperatures, give details of reaction that occurs at different temperatures
A gaseous mixture of O2 and Kr has a density of 1.140 g/L at 415 torr and 300. K. What is the mole percent O2 in the mixture?
What mass of this substance must evaporate in order to freeze 230 of water initially at 24? (The heat of fusion of water is 334 the specific heat of water is 4.18 .)
It takes 78.2 J of energy to raise the temperature of 45.6 g of lead by 13.3 oC. What is the specific heat capacity of Pb? What is the molar heat capacity of Pb.
Calculate the molecular weights of the 5 congeners listed above. What do the trends of log KOA, log KOW, and the negative log of water solubility vs. molecular weight indicate about the relationship between molecular weight and
Solving this question helps the student to understand how to find the limiting reactant and how much product is produced and What mass of product may be produced?
How many moles of CF4 can be produced when 5.00 mol C react with 12.00 mol F2.
Assuming that a neutron star has the same density as a neutron, calculate the mass in kilograms of a small piece of a neutron star the size of a spherical pebble with a radius of 0.10 mm.
How many grams of KNO2 must be added to 5.00 liters of 0.67 M HNO2 solution to produce a buffer with pH = 3.15?
If 4.00 ml of vinegar needs 42.0ml of 0.110M NaOH to reach the equivalence point in a titration, how many grams of acetic acid are in a 1.10qt sample of this vinegar?
Which of the following elements will have the same number of core electrons as P?
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