Gay-Lussac's law gases and the gaseous products can be expressed in simple whole numbers. For example, Gay-Lussac found that 2 volumes of hydrogen and 1 volume of oxygen would react to form 2 volumes of gaseous water. Based on Gay-Lussac's results, Amedeo Avogadro theorized that, at the same temperature and pressure, equal volumes of gas contain equal numbers of molecules (Avogadro's law). This hypothesis meant that the previously stated result could also be expressed as The law of combining gases was made public by Joseph Louis Gay-Lussac in 1808. Avogadro's hypothesis, however, was not initially accepted by chemists until the Italian chemist
Same-sex marriage in the United States Same-sex marriage in the United States Same-sex marriage in the United States expanded from one state in 2004 to all fifty states in 2015 through various state court rulings, state legislation, direct popular votes, and federal court rulings. Same-sex marriage is also referred to as gay marriage, while the political status in which the marriages of same-sex couples and the marriages of opposite-sex couples are recognized as equal by the law is referred to as marriage equality. The fifty states each have separate marriage laws, which must adhere to rulings by the Supreme Court of the United States that recognize