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HELP! Predict the equilibrium concentration of H+ in a 0.25 M solution of H2SO4-? Ka2=0.012? Consider the polynomial x^5-4x^2-7x-2=0. Show that the closed circle centered at x=0 of radius two contains at least two roots.? Is cotton considered a fruit? 1. Identify the lines that are perpendicular. y=6, y=1/5x+2, x=5, and y+3=-5(x+4).? What would happen if the sun went out?