You burn solid magnesium in excess oxygen to form magnesium oxide. If you started with 12.3 grams of magnesium (MM=24.3 g/mol) and end up with 20.4 grams of magnesium oxide (MM=40.3 g/mol), how much
oxygen was used in the reaction?

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

Can someone me with these questions plz.

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.