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오늘의 이미지
Flowering trees at the bottom of the Eiffel Tower in Paris (France). Today is the March equinox, which marks the beginning of astronomical spring in the Northern Hemisphere.
오늘의 미디어
![]() An experiment showing burning of sulfur in oxygen. A flow-chamber joined to gas washing-bottle (filled with solution of methyl orange) is being used. The product is sulfur dioxide (SO2) with some traces of sulfur trioxide (SO3). The 'smoke' that exits the gas-washing bottle is, in fact, a sulfuric acid fog generated in a reaction represented by:
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