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What is the form of the Difference of Squares identity? Polynomial Identities question? Algebra II. It needs to be simplified with steps and solution please.? Calculate the pH of a solution that is 0.0600 M HC7H5O2 and 0.120 M NaC7H5O2. The Ka for HC7H5O2 is 6.5 × 10-5.? How many moles of helium are in a balloon at 755 mmhg if it has a volume of 18 l at 25c?