How many moles of naf are in 34.2 grams of a 45.5% by mass naf solution?

 % by mass = mass solute x 100 / mass solution 

45.5 % = mass solute NaF x 100 / 34.2 

mass solute NaF = 34.2 x 45.5 /100=15.6 g 

molae solute NaF = 15.6 g ( 1 mol / 41.9887 g)= 0.372

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.