The nurse is reviewing a primary healthcare provider's prescription for 20 mEq of potassium chloride to be administered to a client with hypokalemia. The medication arrives with a label stating 20 mEq of potassium chloride in 250 mL of sodium chloride (normal saline). How many milliliters per hour (mL/hr) should the nurse set the infusion pump to when giving it over two hours? Fill in the blank.