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harp AP 2010
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How did he determine that there were 6.022E23 atoms in 12g of carbon?
Avagadro's Number is a constant used in chemistry to represent the number of particles in one mole of a substance. It is approximately 6.022 x 10^23, and is often denoted by the symbol "N".
Amedeo Avagadro was an Italian scientist who lived in the 18th and 19th century. He determined the value of Avagadro's Number by studying the behavior of gases and their properties. He proposed that equal volumes of gases at the same temperature and pressure contained the same number of molecules, which led to the concept of a mole.
Avagadro's Number is important because it allows scientists to easily convert between the number of particles and the amount of substance in moles. It also helps to understand the relationship between the macroscopic properties of substances and their microscopic makeup at the atomic level.
Avagadro's Number is used in chemistry to calculate the number of particles in a given amount of substance, as well as to determine the molar mass of a substance. It is also used in stoichiometry to calculate the amounts of reactants and products in a chemical reaction.
Yes, Avagadro's Number is a fixed value and is considered a fundamental constant in chemistry. It is not dependent on the substance being measured, as it represents the number of particles in one mole of any substance.