Is h2o+nacl a compound element or mixture

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.

Gymnast always perform on padded mats. how does the mats protect the gymnast

In 2002, the rare earth elements mine in mountain pass, california was closed because