why can the moles of reactants and products, rather than their concentrations, be used in the equilibrium constant expression? show calculations to support your answer.

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

What is the molarity of the solution produced when 145 g of nacl is dissolved in sufficient water to prepare 2.75 l of solution?