One Mole Quantities of Common Elements
Numéro d’image : 12635843
| One mole quantities of common elements. The graduated cylinders contain (left to right) mercury (200.59 g), lead (207.2 g), and copper (63.546 g). The Erlenmeyer flask at the left contains sulphur (32.006 g), and the one on the right contains magnesium (24.305 g). The watch glass holds chromium (51.996 g). All rest on sheets of aluminium foil (26.98 g). The mole is the unit of measurement in the International System of Units (SI) for amount of substance. It is defined as the amount of a chemical substance that contains as many elementary entities, e.g., atoms, molecules, ions, electrons, or photons, as there are atoms in 12 grams of carbon-12 (12C), the isotope of carbon with relative atomic mass 12 by definition. The mole is widely used in chemistry as a convenient way to express amounts of reactants and products of chemical reactions. | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Winters, Charles D. |
| Taille de l’image : | 3619 px × 2603 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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