Where did the pendulum have the maximum potential energy?

Why do sodium and neon have vastly different chemical and physical properties despite having similar atomic masses?

When svante arrhenius first proposed his acid-base theory, he was a doctoral candidate. his professors thought his ideas were unfounded. within a decade, the arrhenius theory of acid-base was widely accepted and praised within the scientific world. arrhenius defined acids as compounds having ionizable hydrogen and bases as compounds with ionizable a) barium. b) hydronium. c) hydroxide. d) oxygen.

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.