What volume of 0.500 M NaOH should be added to 750.0 mL of 0.250 M HCO3- to make a buffer with a pH of 10.00? (pKa for HCO3- = 10.32)

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.