The initial pressure and volume of a gas are 55.16 kilopascals and 0.500 liter.
according to boyle's law, if the volume of the gas changes to 0.800 liter, the pressure of the gas will be kilopascals.

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.

Yes you are correct use the scientific method