A student drops two metallic objects into a 120-g steel container holding 150g of water at 25C.
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A student drops two metallic objects into a 120-g steel container holding 150g of water at 25°C. One object is a 194-g cube of copper that is initially at 83°C, and the other is a chunk of aluminum that is initially at 5.0°C. To the surprise of the student, the water reaches a final temperature of 25°C, precisely where it started. What is the mass of the aluminum chunk?
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