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.
It would contain a fixed number of atoms (now called a mole of atoms). If they then measured out 16 g of O atoms, which have a mass Â¹â¶/ââ times that of a carbon-12 atom, they knew that they had the same number of atoms (a mole of each). So a mole is simply a way of counting atoms and molecules.