Question

医院里只有一只氧气瓶,它的容积为10dm³,里面装有密度为2.5kg/m³的氧气,某次抢救

Answer 1

m1=p1*V=2.5*10/1000=0.025(kg),

m2=m1-△m=0.025-0.005=0.02(kg),

p2=m2/V=0.02/(10/1000)=2.0(kg/m^3),

即瓶内剩余氧气的密度为2.0kg/m^3.