C - F

T_c = 5/9(T_F - 32)

F - C

T_F = 9/5(T_c + 32)

F - K

T_K= T_F + 273.15

Atomic Mass

atomic mass = (fraction of isotope x mass of isotope)

Composition

composition = (total mass of element in compound / total mass of the compound) x 100%