A.C16H17O7N4 | B.C17H21O6N4 | C.C17H20O6N4 | D.C18H23O6N3 |
377×54.11% |
12 |
377×5.57% |
1 |
377×25.46% |
16 |
377×14.85% |
14 |
A.硫酸镁 | B.硫酸铝 | C.硫酸亚铁 | D.硫酸钠 |
A.17.5% | B.53% | C.94.3% | D.33% |
A.0.8g | B.0.6g | C.0.4g | D.1.2g |
A.只含碳、氢两种元素 | B.只含碳、氧两种元素 |
C.含有碳、氢、氧三种元素 | D.无法确定 |
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