How many reflexive relations are possible in a set A whose n(A)=3 .

How many trinitrotoluenes are possible?

How many gauche conformations are possible for n- butane ?

How many orbitals are possible for n = 3.1=2 ?

If a set A has 4 elements and a reflexive relation R defined in set A has x elements, then what is the range of x?

How many orbitals are possible for n = 2 and l = 1?

How many gauche conformations are possible for n-butane?

How many Bohr-Sommerfeld orbits are possible for n = 4 ?