What is <mass> of <deuterium oxide> ?
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What is the mass of deuterium oxide?
SELECT DISTINCT ?r WHERE { resource:heavy_water property:mass ?r }
select distinct ?answer where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> <http://wikidata.dbpedia.org/resource/Q155890> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2067> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> ?answer. }
select distinct ?answer where { wd:Q155890 wdt:P2067 ?answer}
20.023