Mark these statements as being True or False for a binary mixture of substances A and B.
____(a) The density of a mixture is always equal to the sum of the densities of its constituents.
_____(b) The ratio of the density of component A to the density of component B is equal to the mass fraction of component A.
_____(c) If the mass fraction of component A is greater than 0.5, then at least half of the moles of the mixture are component A.
_____(d) If the molar masses of A and B are equal to each other, then the mass fraction of A will be equal to the mole fraction of A.
_____(e) If the mass fractions of A and B are both 0.5, then the molar mass of the mixture is simply the arithmetic average of the molar masses of A and B.