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.
/preÂ·curÂ·sor/ (preÂ´kur-ser) something that precedes. In biological processes, a substance from which another, usually more active or mature, substance is formed. In clinical medicine, a sign or symptom that heralds another.precurÂ´sory.he storm increase, the flashes succeeded one another more rapidly, the thunder began to growl, and the wind, the precursor of a hurricane, whistled in the plumes and the hair of the horsemen.