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## Homework Statement

An aluminum cup contains 217g of water at 21.2oC. A 404g sample of silver at an initial temperature of 80.8oC is placed in the water. A 41.0g copper stirrer is used to stir the mixture until it reaches its final equilibrium temperature of 25.7oC. Calculate the mass of the aluminum cup.

## Homework Equations

Q=mCdeltaT

heat lost=heat gained

## The Attempt at a Solution

Could someone please help me set the problem up w/o numbers. Thanks.