Is the supply of copper-rich ores greater or lesser than iron-rich ores?

How many ions that have a +1 charge will bond with an ion that has a -2 charge

For which one of the following reactions is the value of δh° rxn equal to δh° f for the product? a. 2 h2 (g) + o2 (g) → 2 h2o (l) b. n2 (g) + o2 (g) → 2 no (g) c. 2 h2 (g) + o2 (g) → 2 h2o (g) d. h2o (l) + 1/2 o2 (g) → h2o2 (l) e. none of the above

At room temperature what happens to the average kinetic energy of the molecules of a solid, liquid, and a gas