A.64 | B.17 | C.44 | D.16 |
m |
M |
m(A) |
M(A) |
m(O2) |
M(O2) |
1 |
M(A) |
2 |
32 |
A.3gH2 | B.16gO2 | C.32gH2S | D.64gSO2 |
A.一定温度压强下,气体体积由其分子的大小决定 |
B.常温常压下,1molCO和1molCO2所含分子数相同 |
C.水的摩尔质量与1mol水分子的质量相等 |
D.0.5mol•L-1NaOH溶液含有0.5molNa+ |
A.42 | B.56 | C.21 | D.72 |
A.SO2 | B.CO | C.NH3 | D.CH4 |
A.1:2 | B.1:1 | C.2:1 | D.4:1 |
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