The Uniform Crime Reports program began in 1930, and since then has become an important source of crime information for law enforcement, policymakers, scholars, and the media.
The molecular formula for water is H2O. One molecule of water consists of one oxygen atom which is covalently bonded to two hydrogen atoms.
For most ionic compounds, empirical formula is the same as the compoundâs molecular formula. However, for covalent compounds the empirical formula is not necessarily the same as the molecular formula of the compound. For example, the empirical formula of water, H 2 O, is the same as its molecular formula. The empirical formula of hydrogen peroxide is HO, but its molecular formula is H 2 O 2.