A sample of iron metal is cooled by 1000. g of water. The temperature of the water is  raised from 23.0 °C to 30.1 °C. Before contact with the water, the temperature of the iron  was 40.9 °C. What was the mass of the iron sample? The specific heat capacity of iron is 0.449 J/g⋅°C. (Assume the final temperature of the iron and water are the same.)

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