Chemical weights
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Chemical weights
Assorted chemical weights. The different amount of each chemical represents a measurement known as the mole. One mole of any sample contains the same number of molecules or atoms. The weight (shown in grams) of each molar sample is determined by the weight of the molecules (the molecular weight) and is calculated from the weights of the atoms in the molecule. Three of the chemicals are hydrated with water (H2O). The chemical formulae are, clockwise from lower left: NaCl, FeCl3.6(H2O), CuSO4.5(H2O), KI, Co(NO3)2.6(H2O) and KMnO4. The heaviest atom here is iodine (I), 8 times heavier than oxygen (O). The transition metal compounds are coloured
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Media ID 6293755
© ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY
Assorted Assortment Chloride Cobalt Compound Compounds Copper Crystalline Crystals Inorganic Iron Mass Masses Measure Measurement Measurements Metal Molar Mole Potassium Relative Salt Salts Sample Samples Selection Sodium Solid Solids Sulphate Transition Unit Variety Weight Weights Amount Iodide Moles Nitrate Quantities Quantity
EDITORS COMMENTS
This print from Science Photo Library showcases an assortment of chemical weights, each representing a fundamental unit of measurement known as the mole. In the world of chemistry, one mole of any sample contains an equal number of molecules or atoms. The weight, measured in grams, is determined by the molecular weight and calculated based on the individual weights of atoms within the molecule. Within this diverse selection, three chemicals are hydrated with water (H2O), including FeCl3.6 (H2O), CuSO4.5 (H2O), and Co (NO3)2.6 (H2O). As we observe clockwise from the lower left corner, other compounds include NaCl, KI, and KMnO4. Notably, iodine (I) stands out as it is eight times heavier than oxygen (O). The transition metal compounds featured here exhibit vibrant colors that add visual intrigue to this composition. From iron (Fe) to cobalt (Co) and copper (Cu), these elements bring life to their respective compounds. This image provides a glimpse into the fascinating world of chemistry where solid substances are measured using moles - a relative measure that allows scientists to quantify various quantities accurately. These crystalline samples represent different chemical compositions such as salts and inorganic compounds. Science Photo Library has beautifully captured this array of chemical weights which not only serves as a visual delight but also highlights key concepts in chemistry such as mass measurements and compound formation through atomic combinations.
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