공기중산소농도는부피백분율로따져서약78%가질소N2,약21%가산소O2,0.9%가아르곤,0.03%가이산화탄소,그나머지는미량의네온·헬륨·크립톤·크세논·오존으로되어있다
[무물보AI] 답변 로딩중...