Chemistry, 13.05.2021 18:30 chaitanyac90
The active volcano Mauna Loa, in Hawaii, and the now-extinct volcano El Yunque, Puerto Rico, have certain basaltic lava rocks containing the element selenium. Typically, a 25.0 g rock contains 0.005 g of selenium. What is the concentration of selenium in these lava rocks, in ppm?
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The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?
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Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.
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The active volcano Mauna Loa, in Hawaii, and the now-extinct volcano El Yunque, Puerto Rico, have ce...
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