PLZ HELP THNX U What do the following gases have in common? Ne, Ar, Kr, Xe A. All have the same atomic number. B. All have the same number of electron shells. C. All have 8 electrons in their outer orbit D. All have the same atomic weight

Consider the following reaction at equilibrium: c(s)+h2o(g)⇌co(g)+h2(g) predict whether the reaction will shift left, shift right, or remain unchanged upon each of the following disturbances. a) c is added to the reaction mixture. b) h2ois condensed and removed from the reaction mixture c) co is added to the reaction mixture d) h2 is removed from the reaction mixture.