For which of the following reactions are both reactants and products likely to be found when the reaction appears to be complete? explain.
mg+o2⇒2mgo
hf+ h2o⇆h30+f

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 molecules present in 0.750 mol of mgo.

Apiece of copper has a temperature of 75.6 0c. when the metal is placed in 100.0 grams of water at 19.1 0c, the temperature rises by 5.5 0c. what is the mass of the metal?