The state's landlord-tenant laws protect people living in dwellings owned or leased by others. A person need not be listed on a formal lease to gain protection under these laws, but may gain protection by establishing residence in a place.
The mole is useful in chemistry because it is defined such that the mass of Avogadro's number of particles (atoms or molecules) of a substance (the molar mass) is equal to the sum of the numerical values of the atomic masses of its constituent elements.
1 Although it is not possible to directly measure how many moles a substance contains, it is possible to first measure its mass and then convert that amount to moles.  A substance's molar mass is calculated by multiplying its relative atomic mass by the molar mass constant (1 g/mol).