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An insulated beaker with negligible mass contains liquid water with a mass of 0.255{kg} and a temperature of 76.0{C}

How much ice at a temperature of -19.9 C must be dropped into the water so that the final temperature of the system will be 32.2?
Take the specific heat of liquid water to be 4190 J/kg, the specific heat of ice to be 2100 {J/kgK}, ae heat of fusion for water to be 334 {kJ/kg}.

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