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Calculate the heat vaporization of water using the standard enthalpies of formation? Solve for a and c in 8a+6c=1340. a+c must equal 200. Round up/down if needed.? What is a common picture size that's very close to 4x3cm that I can cut down to size? A 1,000 kg sports car accelerates from zero to 30 m/s in 5.0 s. What is the average power delivered by the automobile engine? How many grams of Lithium Hydroxide do you need to dissolve to a total volume of 1.8L to get a 0.45M solution?