Given the two reactions H2S(aq)⇌HS−(aq)+H+(aq), K1 = 9.11×10−8, and
HS−(aq)⇌S2−(aq)+H+(aq), K2 = 1.41×10−19,
what is the equilibrium constant Kfinal for the following reaction?
S2−(aq)+2H+(aq)⇌H2S(aq)

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?

What is a difference between a mixture of elements and a mixture of compounds