A 21.7 g piece of iron and a 28.6 g piece of gold at 100.0°C were dropped into 770.0 mL of water at 25.0°C. The molar heat capacities of iron and gold are 25.19 J/(mol·°C) and 25.41 J/(mol·°C), respectively. What is the final temperature of the water and pieces of metal?

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