19.甲、乙两烧杯中各盛有100 mL 2 mol/L的盐酸和氢氧化钠溶液,向两烧杯中分别加入等质量的铝粉,反应结束后测得生成的气体体积比为甲∶乙=1∶2(同温、同压下),则加入的铝粉的质量为
A.3.6g B.2.7g C.5.4g D.1.8g
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
|
A |
D |
A |
BC |
D |
D |
D |
B |
C |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
DC |
B |
A |
BC |
AD |
C |
A |
0.12 |
A |
|