Earth's atmosphere is approximately 78.0% nitrogen and 21.0% oxygen. What is the mass in grams of oxygen in a cubic meter of air in a typical classroom at 1 atm and 25° C? ( 1 m³ = 1000 L)

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.

The biosphere of the earth is made up of what compound? organic or inorganic?

Kp is the equilibrium constant for dissociation of the propionic acid dimer. what is the sign of the slope for a plot of the natural logarithm of kp vs. inverse temperature for this reaction?