In which sealed container would organisms be able to continuously cycle oxygen and carbon dioxide gases?
an aquarium with fish and plastic plants
a terrarium with a plant and a snail
an aquarium with rocks and a snail
a terrarium with tadpoles and a pool of water

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.