Amedeo Avogadro solutions. Avogadro is hailed as a founder of the atomic-molecular theory. Amedeo Avogadro Amedeo Carlo Avogadro, () Count of Quaregna and Cerreto (9 August 17769 July 1856), was an Italian scientist, most noted for his contribution to molecular theory now known as Avogadro's law, which states that equal volumes of gases under the same conditions of temperature and pressure will contain equal numbers of molecules. In tribute to him, the number of elementary entities (atoms, molecules, ions or other particles) in 1 mole of a substance, , is known as the Avogadro constant, one of the seven SI base units
History of same-sex marriage in the United States states to issue marriage licenses to same-sex couples and to recognize same-sex marriages validly performed in other jurisdictions. This held all state same-sex marriage bans to be unconstitutional and legalized same-sex marriage in all remaining states. The decision came on the second anniversary of the "United States v. Windsor" ruling that struck down Section 3 of the Defense of Marriage Act (DOMA), which denied federal recognition of same-sex marriages. It also came on the twelfth anniversary of "Lawrence v. Texas" which struck down sodomy laws in 13 states. Each justice's opinion on "Obergefell" was consistent with their opinion in "Windsor".