The task involves determining the quantity of individual atoms present within a 30.0 gram sample of arsenic (As). This calculation leverages the concept of the mole, a fundamental unit in chemistry representing Avogadro’s number (approximately 6.022 x 1023) of entities, in this case, atoms. First, the mass is converted to moles using the element’s atomic mass. Subsequently, the number of moles is multiplied by Avogadro’s number to find the total atomic count. For example, determining the atoms in a specific mass of carbon would follow an analogous procedure, utilizing carbon’s atomic mass.
Accurate determination of atomic quantities is vital in various scientific and industrial contexts. In materials science, it informs the composition and properties of substances. In chemistry, it’s crucial for stoichiometric calculations and reaction balancing. Historically, advancements in analytical techniques, such as mass spectrometry, have improved the precision with which elemental composition can be determined, furthering understanding of material behavior and chemical processes.
