A physicist is asked to analyze two mystery metals. Each metal is struck by light with three different wavelengths: 300 nm, 400 nm, and 500 nm. In each case, the physicist adjusts the voltage gradient to determine the energies of the emitted electrons. The results are shown in the chart below. What are the values of X and Y?

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.