用95%和20%的乙醇制备60%乙醇150ml,需20%乙醇多少mlA.55mlB.60mlC.65mlD.70mlE.75ml
用95%和20%的乙醇制备60%乙醇150ml,需20%乙醇多少ml
A.55ml
B.60ml
C.65ml
D.70ml
E.75ml
相关考题:
用95%和45%的乙醇配制75%的乙醇溶液500ml,应取95%和45%的乙醇各多少体积A:250ml,250mlB:260ml,240mlC:300ml,200mlD:245ml,255mlE:350ml,150ml
用95%和20%的乙醇制备60%乙醇150ml,需20%乙醇多少ml()A55mlB60mlC65mlD70mlE75ml