Calculate the number of joules released when 72.5 grams of water at 95 degrees celsius to a final temperature of 28 degrees celsius

Calculate the number of molecules present in 0.750 mol of mgo.

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?

How do you know when a chemical reaction has occurred