A 53.5 g silver block initially at 8.0°C is submerged in water initially at 83.5°C in an insulated container. The final temperature of both substances at thermal equilibrium is 78.5°C. What is the mass of the water? (The heat capacity of silver is 0.235 J/g°C, and the heat capacity of water is 4.18 J/g°C)

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