化學簡單mol數1條

氮氣的摩爾數 = 7/(14*2) = 0.25
設摩爾體積為V dm^3 mol^-1
n/0.25 = V
V = 4n
氧氣的摩爾數 = 16/(16*2) = 0.5
故氧氣的體積
= 0.5 * V
= 0.5 * 4n
= 2n