Assertion: hydrogen | /r/MadeOf | 75% orthohydrogen
Facets:
value: at room temperature
type: LOCATION
Source sentences:
text: At room temperature, hydrogen contains 75% orthohydrogen, a proportion which the liquefaction process preserves if carried out in the absence of a catalyst like ferric oxide, activated carbon, platinized asbestos, rare earth metals, uranium compounds, chromic oxide, or some nickel compounds to accelerate the conversion of the liquid hydrogen into parahydrogen.