ryan is a chemistry student that enjoys hot tea. he wants to determine how much ice is needed to cool 250.0 ml of tea to an optimal drinking temperature of 57.8 °c. the method ryan uses to prepare his tea results in an initial temperature of 80.7 °c. the average mass of an ice cube from the ice tray ryan uses is 20.3 g and has a starting temperature of −5.80 °c. assume that the heat capacity of tea is the same as pure water, and assume no heat is lost to the surroundings. chegg