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2 Questions = Osmolarity ... Picture attached? Evaluate: -x^2 and for -(x)^2 for x = 7 (Please Show Work)? How much CaO (lime) is required to raise the pH of 1 liter of water from 2 to 10.5? Find the dimensions of a rectangle with area 1,000 m2 whose perimeter is as small as possible.? Make t the subject of the formula v=u+5t?