称取0.4829g合金试样,溶解使其中的镍沉淀为丁二酮肟镍NiC 8 H 14 O 4 N 4 (M=288.84g·mol -1 ),经过滤、洗涤、烘干,称得质量为0.2671g,问试样中镍(M=58.69g·mol -1 )的质量分数为多少?
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
皮皮学刷刷变学霸
举一反三
【简答题】B Maggie was very glad that James was not a frequent visitor to the house. In the children’s opinion, they had something that they couldn’t explain or understand about him and that excited their imagi...
【单选题】No, Honey, I don't want you to spend a lot of money on my birthday present. Just having you for a husband is the only gift I need. In fact, I'll just drive my old rusty bucket of bolts down to the mal...
【简答题】改错题 Improve the following passage with what you have learned in this unit. In China ’ s feudal society, Women had little social status, and were regarded as inferior than men. After the women ’ s libe...