The enthalpy change for the following reaction is 206 kJ. Using bond energies, estimate the C-H bond energy in CH4(). CH,(g) + H2O(g)
→3H2(g) + CO(g)

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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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