Please help me with this :(

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

Which atom or ion is the largest? 0 a. 0 0 0 0 e. li

The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?