If an atom has 3 energy levels, how many sublevels should it have

How do you know when a chemical reaction has occurred

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.

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.