Ack wants to find out which laundry detergent cleans the best. so, he takes a cotton sheet and cuts it up into equal squares. he stains four squares with chocolate, and four with grape juice. he washes one of each of the squares in each of the 3 detergents. one from each set of squares is washed in water alone. for each wash load, he used: the same amount of water, the same amount of detergent, and the same temperature of water.

Calculate the number of moles of ethane in 100 grams

)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.

In the experiment you asked to react hydrochloric acid and with sodium hydroxide. when measuring the volume of the reactants, which instrument would give the greatest precision.