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Why do i keep getting this one wrong. help? Is this factored polynomial (x-2)^2(x^2+2x+4) degree 3? 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.? A pair of dice is rolled. Find the probabilities of the given events. The sum is less than 10, given that the sum is 8.? What are common uses for the CH3COOH/CH3COO- buffer?