Three portions of the same liquid are mixed in a container that prevents the exchange of heat with the environment. Portion A has a mass m and a temperature of 96.0°C, portion B
also has a mass m but a temperature of 85.0°, and portion has a mass m and a temperature of 38.0°. What must be the mass of portion so that the final temperature T of the three - portion mixture is T = 51.0°? Express your answer in terms of m ; for example, mc = 2.20m. m = Number
