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...
A.250ml,250ml
B.260ml,240ml
C.300ml,200ml
D.245ml,255ml
E.350ml,150ml 展开
B.260ml,240ml
C.300ml,200ml
D.245ml,255ml
E.350ml,150ml 展开
1个回答
展开全部
【答案】:C
应取95%乙醇的体积为:(75%×500-45%×500)/(95%-45%)=300ml,应取45%乙醇的体积为200ml。
应取95%乙醇的体积为:(75%×500-45%×500)/(95%-45%)=300ml,应取45%乙醇的体积为200ml。
本回答被网友采纳
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询