4. A large quantity of a reactant that precipitates solid gold from gold in solution was added to a large sample of ocean water, but only a trace amount of solid gold resulted after
filtering the mixture. What do you think could be the problem? Describe one of the reactants
as a limiting reagent in your answer.

When balancing a chemical equation:

Which substance has non polar covalent bonds

)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.