Calculate the enthalpy of the reaction
2no(g)+o2(g)→2no2(g)
given the following reactions and enthalpies of formation:
12n2(g)+o2(g)→no2(g), δfh∘a=33.2 kj mol−1
12n2(g)+12o2(g)→no(g), δfh∘b=90.2 kj mol−1

Aballoon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon?

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.

Why is retrograde motion an apparent motion