cup containing 91.0 mL of H2O is initially at room temperature 21.8°C. A chilled steel rod at 3.5°C is placed in the water. If the final temperature of the system is 20.3°C, what is the mass of the steel rod? Use the following values: density of water = 1.00 g·mL−1 specific heat capacity of water = 4.18 J·g−1·°C−1 specific heat capacity of steel = 0.452 J·g−1·°C−1

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