Atwo-step reaction mechanism that has an overall reaction of 2h2o2(aq) mc012-1.jpg 2h2o(l) + o2(g) has the following fast step and rate law. step 2: h2o2 + oi– mc012-2.jpg h2o + o2 + i– (fast) rate = k[h2o2][i–] which is the correct rate-determining step given the information in the reaction above?

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.