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Which is the best acid to use in the preparation of a buffer with pH = 9.3? can someone show me how to get the answer?
NH2OH (Kb = 9.1 x 10^-9)
CH3NH2 (Kb = 3.7 x 10^-4)
NH3 (Kb = 1.8 x 10^-5)
C6H5NH2 (Kb = 4.3 x 10^-10)
The emulsifying agent from hand cream, a salt, is prepared from two chemicals. Write the structure of stearic acid.
One of the differences between a voltaic cell and an electrolytic cell is that in an electrolytic cell,
What is the binding energy, in amu, of 13C? Masses are: proton = 1.00728 amu, neutron = 1.00867 amu, electron = 0.00055 amu, and 13C = 13.00335 amu.
Starting with 3.30 moles of HBr in a 12.0 L reaction vessel, calculate the concentration of H2, Br2, and HBr at equil.
If a current of 40 mu A (40x10-6A) is drawn from a solar cell for 6 months, how many faradays are involved
Assuming the pressure and temperature of the gas remain constant, calculate the number of moles of gas added to the container.
Ethylene glycol (EG) is a commonly used automotive antifreeze. Calculate the boiling point and the freezing point of the 25% EG solution if Kb=0.512oC/m and Kf=1.86oC/m for water. Molar mass of EG=60.05 g/mol.
If the ion of element X has a mass number of 230 and has 86 electrons, what is the identity of the element? How many neutrons does it have?
ideal gas on a cool morning (11*C). The air is heated to 103*C. What is the volume of the air in the balloon after it is heated?
how much energy is required to vaporize 48.7 g of CH2Cl2 at its boiling point if its Hvap = 31.6 kg/mol
Calculate the amount of heat transferred when 7.10 g of Mg(s) reacts at constant pressure with excess oxygen. How many grams of MgO are produced during a run of this reaction which experiences an energy change of - 234 kJ
Sulfur dioxide gas is oxidized in 50 percent excess air with 70 percent conversion to sulfur trioxide. The gases enter the reactor at 350 oC and leave at 450 oC.
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