Whats the chemical equation for gypsum (made from Cacl2·2H20 and H2SO4)

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

What is the work done by the electric force to move a 1 c charge from a to b?

Use the drop-down menus to label each of the following changes p for physical change and c for chemical change. the substance changes to a new substance. the original substance can be recovered. the color changes. gas is produced and given off. the substance changes size, shape, or volume.