B. write a balanced chemical equation for the formation of the copper oxide product
from copper metal and oxygen gas.

2Cu + O₂   =>   2CuO

Explanation:

I am assuming Copper II, the most common form as listed in order of commonality on the periodic table.

Write a skeleton equation

Cu + O₂   =>   CuO

Because oxygen is a diatomic atom, it must have 2 atoms when it is alone.

Balanced

2Cu + O₂   =>   2CuO

The only way to increase the number of oxygen atoms in the right side is by doubling all of CuO.

As a result, I need 2 copper atoms on the left side also.

By doubling that, the equation is balanced.

Both sides have 2 copper and 2 oxygen atoms.

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.