. "2019-02-04 14:52:10.0" . . . "2" . "SDN:P07::CF12N532" . "false" . . . . "SDN:P07::CF12N532" . "\"Mole fraction\" is used in the construction \"mole_fraction_of_X_in_Y\", where X is a material constituent of Y. A chemical or biological species denoted by X may be described by a single term such as \"nitrogen\" or a phrase such as \"nox_expressed_as_nitrogen\". The chemical formula for nitrous acid is HNO2."@en . "" . "accepted"@en . "2019-02-04 14:52:10.0" . . "mole_fraction_of_nitrous_acid_in_air"@en . . "SDN:P07::CF12N532" . "2" .