- The formula for Ca+2 & O-2?

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HELP! Predict the equilibrium concentration of H+ in a 0.25 M solution of H2SO4-? Ka2=0.012? 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? An object is located 23 cm from a diverging lens with a focal length of 20 cm determine the image distance? (10-18),(-8-1)?