So i have no idea how to do this problem. Permanant hard watee contains calcium sulfate and can be softened by adding sodium carbonate. Determine the number of moles sodium carbonate needed to react 27.2 moles of calcium sulfate.
a. Write the chemical equation
b. Balance the chemical equation​

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?

In most resting cells, the concentration of sodium ions is higher outside of cells compared with the intracellular fluid. when cells are stimulated, sodium ion channels open, and sodium diffuses from the outside of the cell to the inside of the cell. sodium ion concentrations in a resting cell are an example of and sodium ion movement in a stimulated cell is an example of in most resting cells, the concentration of sodium ions is higher outside of cells compared with the intracellular fluid. when cells are stimulated, sodium ion channels open, and sodium diffuses from the outside of the cell to the inside of the cell. sodium ion concentrations in a resting cell are an example of and sodium ion movement in a stimulated cell is an example of potential energy; kinetic energy kinetic energy; potential energy the energy of motion; stored energy chemical work; energy stored in chemical bonds

Fecl3 + naoh → nacl + fe(oh)3 what are the coefficients that should be added to balance this equation? use complete sentences to explain your answer. explain how this chemical reaction demonstrates the conservation of mass.