Which of the following statements about the mole is false?
a. one mole of atoms makes up an amount of atoms that can be seen with the naked eye.
b. one mole of a monatomic element has a mass equal to its atomic mass expressed in grams.
c. a mole of a monatomic element corresponds to one avogadro's number of atoms.
d. one mole of water contains 1/2 mole of oxygen atoms.
e. none of the above

In a copper wire, a temperature increase is the result of which of the following

What is the molar mass of ca(cio4)2

)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.