配制75%乙醇溶液500ml,需用多少95%乙醇A.325mlB.355mlC.395mlD.425mlE.455ml
配制75%乙醇溶液500ml,需用多少95%乙醇
A.325ml
B.355ml
C.395ml
D.425ml
E.455ml
配制75%乙醇溶液500ml,需用多少95%乙醇
A.325ml
B.355ml
C.395ml
D.425ml
E.455ml
第3题
配制75%酒精溶液500ml,需用95%乙醇多少
A.325ml
B.355ml
C.395ml
D.425ml
E.455ml
第6题
用95%和45%的乙醇配制75%的乙醇溶液500ml,应取95%和45%的乙醇各多少毫升
A.250ml,250ml
B.200ml,300ml
C.300ml,200ml
D.225ml,275ml
E.275ml,225ml
第7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
A.250ml,250ml
B.260ml,240ml
C.300ml,200ml
D.245ml,255ml
E.350ml,150ml
第8题
A.250ml,250ml
B.260ml,240ml
C.300ml,200ml
D.245ml,255ml
E.350ml,150ml
第10题
配制75%乙醇溶液100ml,需95%乙醇
A.60ml
B.75ml
C.80ml
D.79ml
E.85ml
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