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,250mlB.200ml,300mlC.300ml,200mlD.225ml,275mlE.275ml,225ml
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
相关考题:
用95%的乙醇配制75%的乙醇500ml,下面配制正确的是( )。A.量取95%乙醇395ml,用水稀释至500mlB.量取95%乙醇395ml,加入水105ml,混匀C.量称95%乙醇375ml,用水稀释500mlD.量取95%乙醇375ml,加入125ml水混匀
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,250mlB.260ml,240mlC.300ml,200mlD.245ml,255mlE.350ml,150ml
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45%的乙醇配制75%的乙醇溶液500ml,应取95%和45%的乙醇各A:250ml,250mlB:260ml,240mlC:300ml,200mlD:245ml,255mlE:350ml,150ml
用95%的乙醇配制75%的乙醇500ml,下面配制正确的是()。A、量取95%乙醇395ml,用水稀释至500mlB、量取95%乙醇395ml,加入水105ml,混匀C、量称95%乙醇375ml,用水稀释500mlD、量取95%乙醇375ml,加入125ml水混匀
单选题用95%和45%的乙醇配制75%的乙醇溶液500mL,应取95%和45%的乙醇各( )。A250mL,250mLB260mL,240mLC300mL,200mLD245mL,255mLE350mL,150mL
单选题下列哪种溶液适用于大规模防癌普查的固定液?( )A95%乙醇溶液B75%乙醇溶液C氯仿乙醇溶液D乙醚乙醇溶液E卡诺固定液