Can anybody help me asap pls

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

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.

If 90.0 grams of ethane reacted with excess chlorine, how many grams of dicarbon hexachloride would form