The equation for the pH of a substance is where H + is the concentration of hydrogen ions What is the approximate pH of a solution whose hydrogen ion concentration is pH=-log[H^ + ], 2 * 10 ^ - 9

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers