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An 11.0 gram sample of CaCl2(s) is dissolved in 125 grams of water with both substances at 25.0°C. If the final temperature of the mixture is 39.2 °C, what is the enthalpy of the dissolution of CaCl2?
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A 1.526 g sample of a polymer dissolved in 1.00 L of a benzene solution at 22°C has an osmotic pressure of 4.52 x 10-2 atm. What is the molar mass of thepolymer?
Upon decomposition, one sample of magnesium fluoride produced 2.55 kg of magnesium and 3.99kg of fluorine. A second sample produced 1.40 kg of magnesium. How much fluorine (in grams) did the second sample produce?
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Calculate the number of moles of barium chloride in 427g of a 3.17% by mass barium chloride solution?
A student finds that the mass of an object is 6.62 kg. She is told that her measurement has an error of 12.3%. What is the true mass (in kg) of the object?
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