A.25.0% | B.27.6% | C.72.4% | D.75.0% |
A.XY | B.X2Y | C.X2Y3 | D.X2Y5 |
A.950mL;201.4g | B.1000mL;212.0g | C.100mL;21.2g | D.500mL;100.7g |
A.0.21mol/L | B.0.42mol/L |
C.0.56mol/L | D.0.26mol/L |
A.46g NO2和N2O4的混合气体中含有的原子总数为3NA |
B.12g金刚石中含有的共价键键数为4NA |
C.0.1 mol NaHCO3晶体中含0.2NA个离子 |
D.将0.2 mol的硫化钾溶于水配成1升溶液,其阴离子数目肯定多于0.2NA |
实验次数 | 加入盐酸的体积 | 沉淀质量 |
1 | 60 mL | 0 |
2 | 80 mL | 0.78 g |
3 | 180 mL | 5.46 g |
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