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Is the Universe chicken egg shaped? Calculate initial pH, pH at each 5mL aliquot and pH at equivalence point for titration of 25mL of 1.25M quinoline w/ 50mL of 1.0 M HBr???? The area of a rectangle is 1260 square inches . its length is 36 inches find the width? Not sure how to find the derivative? In 56 g of Na2SO4, how many moles of electrons?