Can somebody help with these chemistry questions?!?!?!?!?

Posted on 2016-12-15 18:38:00 in Chemistry by RYAN

1.) Determine the pOH of a 0.105 M methylamine, CH3NH2 solution. The Kb of the ionization is equal to 3.70E-4. 
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2.) A .010 M NH3 solution was prepared and it was determined that the NH3 had undergone 4.2 percent ionization. Calculate Kb for ammonia. 
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3.) For ethanol, the enthalpy of vaporization is 38.6 kJ/mol and the normal boiling point is 78.37 degrees Celsius. What is the entropy of vaporization when .46 moles of ethanol is vaporized?

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