Use the activity series to determine whether or not the following substances would react: Zinc and sodium chloride
a Yes, zinc will replace chloride
b No reaction
b Yes, zinc will replace sodium

The teacher is mostly talking about the distillation of a mixture

Answer:

5.6⋅10−^19  j

do you need the explaination?

The answers are 3.c kelvin4.b liquids only

Remember that rust prevented by placing a sacrificial electrode in electrical contact with the iron. the sacrificial electrode must be composed of a metal that  oxidizes  more easily than iron (that is, it must be below iron in table 18.1).