For which entalphy changes is the value of ΔH always negative? 1- combustion
2-hydration
3-solution

( the answer choices is a, b,c, d)
a) 1,2 & 3 are correct
b) 1 & 2 are correct
c) 2 & 3 are correct
d) 1 only is correct

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.

What is the polyatamic ion of borate

In salt water solution, the salt is the blank