Amedeo Avogadro (1776-1856). Gives the relationship between volume and amount when pressure and temperature are held constant. Remember amount is measured in moles. Also, since volume is one of the variables, that means the container holding the gas is flexible in some way and can expand or contract.medeo Avogadro (1776-1856). Gives the relationship between volume and amount when pressure and temperature are held constant. Remember amount is measured in moles. Also, since volume is one of the variables, that means the container holding the gas is flexible in some way and can expand or contract.
Definition of presidence. plural. -s. 1 : the action or fact of presiding : direction, superintendence by the presidence and guidance of an unseen governing power â William Wollaston. 2 : presidency 1a preserve both the senate and the presidence â P. G. Hamerton.
1. (often cap.) the chief of state and often the chief executive officer of a modern republic, as the United States. 2. an officer appointed or elected to preside over an organized body of persons. 3. the chief officer of a college, society, corporation, etc. 4. one who presides. [1325â75; Middle English < Latin praesident- (s. of praesidÄns), n. use of present participle of praesidÄre to preside over]