A . 280ml
B . 285ml
C . 290ml
D . 295ml
E . 300ml
[单选题]临床急需70%乙醇400 ml,问需取95%乙醇的体积是A.280mlB.285mlC.290mlD.295 mlE.300ml
[单选题]欲用95%乙醇和蒸馏水配制70%乙醇1000ml,所取95%乙醇体积约为( )。A.500mlB.665mlC.700mlD.737mlE.889m
[单选题]用95%和20%的乙醇制备60%乙醇150ml,需20%乙醇多少ml()A .55mlB .60mlC .65mlD .70mlE .75ml
[单选题]若需用70%乙醇1000ml,现有95%乙醇,应取多少量的95%乙醇进行配制( )。A.536.8mlB.636.8mlC.836.8mlD.736.8mlE.568.6ml
[单选题]配制75%乙醇溶液100mL,需95%乙醇( )。A.97mLB.80mLC.65mLD.79mLE.60mL
[判断题] 95%乙醇是指100Ml乙醇中含有95g乙醇。A . 正确B . 错误
[单选题]欲配(2+3)乙醇溶液1L,量取冰乙酸400mL,加水()mL。A . 600B . 400C . 500D . 200
[单选题]若需要70%的乙醇1000ml,现有95%的乙醇应如何配制A.取263.2ml95%的乙醇,加水稀释至1000mlB.取263.2ml95%的乙醇,加
[单选题]现有95%乙醇500ml,要配制70%乙醇,需加入灭菌蒸馏水A.155mlB.165mlC.178mlD.185mlE.195ml
[单选题]现有95%乙醇1000ml,要配制70%乙醇,需加入灭菌蒸馏水A.310mlB.320mlC.357mlD.370mlE.410ml