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Calculate the pH of 1.0 L of the solution that is 0.44 M in NH3 and 0.16 M in NH4Cl upon addition of 0.020 mol of solid NaOH. pKb = 4.75.? If f(x,y)=x^(2)+y^(2)-2x and D is triangular region with vertices (2,0) (0,2) and (0,-2). Find absolute max and min of f on the region of D.? I've tried everything to do #4 and can't figure it out? Why each pair of chromosome has different shape? Can you help me understand Asuality?