Assertion: ammonia | /r/CreatedBy | passing them
Facets:
value: over iron
type: OTHER
value: over cobalt
type: OTHER
value: over manganese
type: TRANSITIVE-OBJECT
value: over chromium
type: OTHER
Source sentences:
text: It has long been known that nitrogen and hydrogen will combine in the presence of suitable catalysts, and it was suggested by Clark in 1874, that ammonia might be made by passing them over chromium, manganese, iron, or cobalt.
text: It has long been known that nitrogen and hydrogen will combine in the presence of suitable catalysts, and it was suggested by Clark in 1874, that ammonia might be made by passing them over chromium, manganese, iron, or cobalt.