A normal cubic meter (Nm³ ) is the metric expression of gas volume at standard conditions and it is usually (but not always) defined as being measured at 0 °C and 1 atmosphere of pressure.
1 kmol of any ideal gas equals 22.414 Nm³ of that gas at 0 °C and 1 atmosphere of absolute pressure .. and 1 lbmol of any ideal gas equals 379.482 scf of that gas at 60 °F and 1 atmosphere of absolute pressure.