【单选题】1×(1+1/2)×(1+1/3)×……×(1+1/17)的值是( )。
【单选题】下列关于阿伏加德罗常数的说法不正确的是( )
B.
0.012kg 12 C含有的碳原子数就是阿伏加德罗常数
C.
含有阿伏加德罗常数个粒子的物质的量是1mol
D.
1molNH 3 所含原子数约是2.408×10 24
【简答题】I’m afraid your requirement of commission is difficult for us to accept. Let’s [填空(1)] each other half way. Mutual efforts will carry us a step forward.A. meet
【简答题】I’m afraid your requirement of commission is difficult for us to accept. Let’s [填空(1)] each other half way. Mutual efforts will carry us a step forward.A. meet
【单选题】下列关于阿伏加德罗常数的说法不正确的是( )
A.
0.012 kg 12 C含有的碳原子数就是阿伏加德罗常数
C.
含有阿伏加德罗常数个粒子的物质的量是1 mol
D.
1 mol NH 3 所含原子数约是2.408×10 24
【多选题】下列关于阿伏加德罗常数的说法正确的是 ( )
B.
12 g 12 C含有的碳原子数就是阿伏加德罗常数
C.
含有阿伏加德罗常数个粒子的物质的量就是1 mol
D.
1 mol氯含有6.02×10 23 个氯分子
【简答题】Thanks ___ mutual efforts, we were able to bridge the price gap and put the deal through.
【单选题】下列说法错误的是( )
A.
6.02×10 23 是阿伏加德罗常数的近似值
【单选题】___ mutual efforts, we were able to bridge the price gap and put the deal through.