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An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27C. A 435-g sample of silver at an initial temperature

An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27C. A 435-g sample of silver at an initial temperature of 85C is placed in the water. The stirrer is used to stir the mixture gently until it reaches its final equilibrium temperature of 32C. Calculate the mass of the aluminum cup.

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