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HELP! Predict the equilibrium concentration of H+ in a 0.25 M solution of H2SO4-? Ka2=0.012? Two parallel sides are 14 feet long the perimeter is 60 square feet. what is the length of the other two parallel sides? What is this?? 32°45' 43"N 112°43' 37"W? Are races valid biological units in humans? Why or why not? How can you solve the problem of health care providers who don't have a working phone number, or don't return calls?