63.5 MB (11.3 MB compressed)
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48.5 x 32.8 cm ⏐ 19.1 x 12.9 in (300dpi)
SCIENCE SOURCE / SCIENCE PHOTO LIBRARY SCIENCE SOURCE / SCIENCE PHOTO LIBRARY
A mole represents the amount of an element that equals the number of atoms, photons, electrons, etc in 12 grams of carbon-12.
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