计算题:欲配制(2+3)乙酸溶液1L,如何配制?
解:VA=V×A(A+B)=1000×2(2+3)=400mlVB=1000-400=600ml量取冰乙酸400ml加蒸馏水600ml混匀。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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