500毫升一袋生理盐水含盐率0.9%,一袋生理盐水含水多少毫升

问题描述:

500毫升一袋生理盐水含盐率0.9%,一袋生理盐水含水多少毫升

已知:V=500ml;盐%=0.9%;
求:V水=?
V盐=V×盐%=500ml×0.9%=4.5ml
V水=V-V盐=500ml-4.5ml=495.5ml
答:一袋生理盐水含水495.5ml.