Which set of materials includes the fewest number of ingredients that are needed to make a lemon into an effective battery that can power a digital clock?
O a lemon, copper wire, an external source of reactants, and copper and zinc electrodes
a lemon, a lime, copper electrodes, and an external source of reactants
a lemon, copper wire, and copper and zinc electrodes
a lemon, platinum electrodes, and copper wire

What are the concentrations of hydroxide and hydronium ions in a solution with a ph of 10.2?

Chemistry worksheet - i am not sure what they are asking for exactly?

)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.