One mole of carbon
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One mole of carbon
One mole of carbon. Carbon powder being weighed out on a balance. 12 grams of carbon is 1 mole. A mole is a chemical unit of measurement that shows the number of molecules or atoms present. One mole of any substance has the same number of chemical units, a vital concept in understanding chemical reactions and calculations. The mole was defined in 1971 in relation to the number of atoms in 12 grams of the most abundant isotope of carbon. This immensely large number (Avogadros number) is over 600 billion trillion atoms, or a six followed by 23 zeros. All atomic weights are given relative to carbons atomic weight of 12 grams per mole
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Media ID 6284027
© ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY
Atomic Balance Carbon Device Element Mass Measure Measurement Measuring Molar Mole Powder Relative Solid Unit Weighing Weight Weights Amount Definition Laboratory Quantity
EDITORS COMMENTS
This print from Science Photo Library showcases the precise measurement of one mole of carbon using a balance. The image depicts a laboratory setting, where carbon powder is being carefully weighed out on the balance. It is fascinating to note that 12 grams of carbon represents one mole, which serves as a fundamental unit in chemistry for quantifying the number of molecules or atoms present. The concept of the mole plays a crucial role in understanding chemical reactions and calculations. Its definition was established in 1971 based on the number of atoms found in 12 grams of carbon's most abundant isotope. This defining quantity, known as Avogadro's number, exceeds an astonishing figure: over 600 billion trillion atoms or written out as six followed by an astounding 23 zeros. In chemistry, all atomic weights are measured relative to carbon's atomic weight per mole, which stands at precisely 12 grams. This photo emphasizes not only the importance but also the precision involved when working with such measurements and quantities in a laboratory setting. The image captures both scientific equipment and elements associated with this field—such as balances, powders, chemicals—and provides viewers with insight into how scientists measure and quantify substances accurately. Overall, this visually striking photograph offers a glimpse into the world of chemical analysis while highlighting key concepts essential for any aspiring chemist to grasp.
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