A.把溶剂蒸发掉一半 |
B.加入6gNaNO3晶体 |
C.把溶剂蒸发掉30g |
D.加入20%的NaNO3溶液30g |
1 |
2 |
60g×10% |
35g |
60g×10%+6g |
60g+6g |
60g×10% |
30g |
60g×10%+30g×20% |
60g+30g |
A.蒸发25g水 | B.蒸去一半溶剂 |
C.加5gKNO3 | D.温度升高到30℃ |
A.大于15% | B.等于15% | C.小于15% | D.无法确定 |
A.① | B.② | C.③ | D.④ |
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