实验编号 |
① |
② |
③ |
④ |
⑤ |
稀硫酸的质量(g) |
20.0 |
40.0 |
60.0 |
80.0 |
100.0 |
溶液的总质量(g) |
120.0 |
140.0 |
159.78 |
179.56 |
199.56 |
请回答下列问题: