A.1:20 | B.2:3 | C.1:220 | D.1:222 |
烧杯序号 | 温度/℃ | 水的质量/g | 硝酸钾质量/g | 溶液质量/g |
① | 20 | 50 | 10 | 60 |
② | 20 | 100 | 30 | a |
③ | 20 | 100 | 36 | 131.6 |
④ | 30 | 100 | 45 | 145 |
A.500 g | B.400 g | C.200 g | D.100 g |
A.106m | B.195mL | C.245mL | D.400.8mL |
A.9% | B.11% | C.15% | D.18% |
A.1% | B.5% | C.10% | D.20% |
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