【简答题】【T18】 A. BADLY B. BE COINED AFTER C. REFUSE TO D. HORN 1782 TO 1792 A. HE TREATED HIS POOR TENANTS VERY【T13】______ B. WHO LIVED【T14】______ C. MEANS TO【T15】______ HAVE ANYTHING TO DO WITH SOMEBODY OR S...
【简答题】设nA 代表阿伏加德罗常数(NA )的数值,下列说法正确的是
【单选题】—What time will Mr. Green be back to China? —Sorry. I don’t know ________.
B.
why he is going abroad
C.
how soon will he be back
D.
how long he will stay abroad
【单选题】设N A 代表阿伏加德罗常数的值,下列说法不正确的是( )
A.
阿伏加德罗常数N A 是0.012kg l2 C中所含的原子数
C.
标准状况下,11.2LNH 3 所含的原子数目为0.5N A
D.
含71gNa 2 SO 4 的溶液中所含Na + 离子数目为N A
【简答题】【T15】 A. BADLY B. BE COINED AFTER C. REFUSE TO D. HORN 1782 TO 1792 A. HE TREATED HIS POOR TENANTS VERY【T13】______ B. WHO LIVED【T14】______ C. MEANS TO【T15】______ HAVE ANYTHING TO DO WITH SOMEBODY OR S...
【单选题】China's flag is _____________. [ ]
【单选题】根据以下资料,回答13~16题。 The winter in Iceland has been one of the worst ever.An animal that was born in Iceland and just returned there has enjoyed the weather.Keiko is a killer whale who is now living in a ...
A.
die from the cold water in Iceland
B.
be happy to return home
【单选题】设N A 代表阿伏加德罗常数的值,下列说法不正确的是( )。
A.
阿伏加德罗常数N A 是0.012kg 12 C中所含的原子数
C.
标况下,22.4L NH 3 所含的分子数目为N A
D.
1 L 1 mo1·L -1 NaCl溶液中所含有的Na + 离子数目为N A
【单选题】用N A 表示阿伏加德罗常数的值,下列说法正确的是( )
A.
若5.6 L N 2 中含有n个氮分子,则阿伏加德罗常数一定为4n
B.
4.6 g Na与100 mL含0.1 mol HCl的盐酸溶液反应,转移电子数目为0.2N A
C.
14 g乙烯和丙烯的混合气体中所含分子总数为0.5N A
D.
标准状况下,22.4 L CCl 4 含有的分子总数为N A