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Two times j plus three times the sum of j and nine.? Calculate the mass of solute required to make a sodium chloride solution containing 165 g of water that has a melting point of -2.0 ∘C.? Is twelve noon am or pm and what time is twelve noon? Was the earliest farming culture developed in China? What laboratory did Darwin use to prove his theory about the "Origin of Species" and how long did it take to prove his theory?