Assertion: nitrogen dioxide | /r/HasProperty | prepared in the laboratory
Facets:
value: as in the following equation
type: OTHER
Source sentences:
text: Nitrogen dioxide is prepared commercially by oxidizing NO with air, but it can be prepared in the laboratory by heating the nitrate of a heavy metal, as in the following equation, 2Pb(NO 3 ) 2 + heat → 2PbO + 4NO 2 + O 2 , or by adding copper metal to concentrated nitric acid.