. "2008-04-15 14:00:00.0" . . . "SDN:P07::CFV8N44" . . . "accepted"@en . . "1" . . "1" . "false" . "2008-04-15 14:00:00.0" . . "" . "mole_fraction_of_nitrous_oxide_in_air"@en . . . "SDN:P07::CFV8N44" . "SDN:P07::CFV8N44" . "Mole fraction is used in the construction mole_fraction_of_X_in_Y, where X is a material constituent of Y. The chemical formula of nitrous oxide is N2O."@en .