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molecular weight

(Encyclopedia) molecular weight, weight of a molecule of a substance expressed in atomic mass units (amu). The molecular weight may be calculated from the molecular formula of the substance; it is…

The Journals of Lewis & Clark: May 12, 1805

by Meriwether Lewis and William Clark May 11, 1805May 13, 1805May 12, 1805 Sunday May 12th 1805. Set out at an early hour, the weather clear and Calm; I walked on shore this morning…

The Journals of Lewis & Clark: May 16, 1806

by Meriwether Lewis and William Clark May 15, 1806May 17, 1806May 16, 1806 Friday May 16th 1806. Drewyer's horse left his camp last night and was brought to us this morning by an…