考完刚到家! 来问几题一直耿耿於怀的问题>< 1. Three flasks, 1.0L , STP, A装:He B: O2 C: H2 How many of the flasks at STP are less dense than air at STP ? 2. The majority of shell electron transition in molecules occur in the _____ region of the electromagnetic spectrum A) IR B) X rays C) UV D) microwave 3. 电池 Cu^2+ + 2Ag → 2Ag^+ + Cu 请问分别加 Ag^+ 或 Cu^2+ 会影响 cell potential 吗? 4. An ideal gas expands to the vacuum isothermally and irreveribly W is A) <0 B) >0 C) =0 D) more imformation is needed △U is A) <0 B) >0 C) =0 D) more imformation is needed △G is A) <0 B) >0 C) =0 D) more imformation is needed △Ssys is A) <0 B) >0 C) =0 D) more imformation is needed 以上，请求板大解惑! --

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