In a calorimetry experiment, a student forgot to weigh a sample of lead that she used in the experiment. She heated the lead to 350.oC and immediately placed the heated sample into a polystyrene calorimeter containing 475. gm H2O at 22.5oC. The final temperature was 35.7oC. What was the mass of the lead sample? Specific heat capacity of lead is: 0.121 J/gm/oC and for water: 4.184 J/gm/oC.
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