Air is made up of different gasses such as oxygen nitrogen and carbon dioxide. which statement best describes these three components of air? -they are all classified as pure substances
-they cannot react with another substance
-they are chemically bonded to one another
-they can be classified as elements

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

C3h8o3 - glycerol major species present when dissolved in water

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?