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What should be added to equation to make it a perfect square 9x^4 + 2x^2 + 25? ....Please!? How many liters at STP will 453.6 grams of SO2 produce? If a and b are positive integers such that gcd(a,b)=210, lcm[a,b]=210^3, and a** **What is the final temp (in oC) when 20.0 g of water at 25°C is mixed with 30.0 g of water at 80.°C? Specific heat of water is 4.184 J/goC.? Point A on a coordinate grid is at (3,4). What are the coordinates of R y=x (A) ?