Given the balanced equation representing a reaction:
nh3(g) + h2o(l) ==> nh4+(aq) + oh-(aq)
according to one acid-base theory, the nh3(g) molecules act as
(1) an acid because they accept h+ ions
(2) an acid because they donate h+ ions
(3) a base because they accept h+ ions
(4) a base because they donate h+ ions

Agas mixture with a total pressure of 745 mmhg contains each of the following gases at the indicated partial pressures: co2, 245 mmhg ; ar, 119 mmhg ; and o2, 163 mmhg . the mixture also contains helium gas. part a what is the partial pressure of the helium gas? phe p h e = nothing mmhg request answer part b what mass of helium gas is present in a 10.2-l sample of this mixture at 283 k ? m m = nothing g request answer

Compare and contrast the bohr model and the electron cloud models of the atom.

What are the similarities of physical and chemical change ?