a) Explain how many liters of ethylene glycol, CH2 (OH) CH2(OH) must be added to a car radiator that contains a total of 6.5 L of coolant in order to protect the cooling system from freezing to a temperature of - 20 °C. The density of ethylene glycol is 1.11 g/mL. Presume that the volumes of water as well as ethylene glycol are additive.
b) Explain what is the boiling point of the solution? Define why would ethylene glycol be added to the cooling system of a car in Houston?