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In 2015, researchers at the Max Planck Institute in Mainz found that the decomposition of this compound exhibits superconductivity at 203 Kelvin. For 10 points each:
[10m] Name this compound, found in large quantities in sour gas. This compound is subjected to combustion at the beginning of the Claus process.
ANSWER: hydrogen sulfide [or H2S]
[10e] The Girdler sulfide process relies on an isotopic exchange between hydrogen sulfide and water to isolate this substance. This form of water is 10% denser due to containing a common hydrogen isotope.
ANSWER: heavy water [or deuterium oxide or deuterium water or deuterated water or D2O; prompt on water]
[10h] A paper of this compound is used to detect hydrogen sulfide by forming a gray precipitate. Along with an oxide, this ionic compound makes up a solution called Goulard’s extract that is used as an astringent.
ANSWER: lead(II) acetate [or lead acetate; or lead diacetate; accept Saturn’s salt]
<Science - Chemistry>

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Data

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