5.97 g of fluorene is added to 0.250 kg of benzene and it was found that the freezing point of benzene decreased by 0.737 °C. What is the experimental molar mass of fluorene? K of benzene = 5.12 K∙ kg/mol, van’t Hoff factor of fluorene = 1. ___ g/mol

There is one s orbital, and there are three p orbitals, five d orbitals, and seven f orbitals. thus, the answer is b. do not confuse the number of orbitals in a subshell with the number of electrons the subshell can hold. each orbital can hold two electrons, so the capacity of an nf subshell is 14 electrons.