What is missing from the following beta reactions the top one only

According to the diagram; a) identify the anode of the cell and write the half-reaction that occurs there b) write the overall equation for the reaction that occurs as the cell operates c) calculate the value of the standard cell potential ,e cell. d)write the shorthand notation of the cell above e)indicate the flow of the electrons on the diagram

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Element before carbon on the periodic table