• 2022-06-06
    需要50%的NaCl溶液1000ml,现有80%和25%浓度的NaCl溶液,将如何配置
    A: 需要80%145.5ml,25%854.5ml
    B: 需要80%344.5ml,25%656.5ml
    C: 需要80%336.5ml,25%633.5ml
    D: 需要80%454.5ml,25%545.5ml
    E: 需要80%498.0ml,25%502.0ml