A sample of iron, which has a specific heat capacity of 0.449 J.g¯1.°C¯1, is put into a calorimeter (see sketch at right) that contains 250.0 g of water. The iron sample starts off at 85.4 °C and the temperature of the water starts off at 20.0 °C. When the temperature of the water stops changing it's 21.6 °C. The pressure remains constant at 1 atm. Calculate the mass of the iron sample. Be sure your answer is rounded to the correct number of significant digits. 60 g ☐ x10 ?