An insulated beaker with negligible mass contains liquid water with a mass of 0.215 kg and a temperature of 66.8 C. How much ice at a temperature of -23.3 C must be dropped into the water so that the final temperature of the system will be 35.0 C? Take the specific heat of liquid water to be 4190J/kg x K , the specific heat of ice to be 2100 J/kg x K, and the heat of fusion for water to be 3.34×105J/kg .