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| The first element in the periodic table, a light, highly flammable gas that combines with oxygen to make water.
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Flask of hydrogen gas.
25ml of hydrogen gas at a pressure of 1 atmosphere. This vessel is sealed with a teflon stopper which should limit diffusion. However molecules of hydrogen gas are so small and move so rapidly that they will eventually escape.
Source: produced by reacting zinc metal with dilute hydrochloric acid.
Size: flask diameter 2"
Purity: > 99%
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Ampoule of heavy water.
This ampoule contains 0.75ml of deuterium oxide, better known as heavy water. It looks identical to ordinary water but has a density of 1.11 g/cm^3 rather than 1. Apparently you become drunk if you drink it.
Source: Merck
Size: ampoule height 2"
Purity: >99.96%
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