钢铁生锈的过程十分复杂，已知某铁锈含有Fe2O3•nH2O(n≤1)，还_爱下问搜题

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问题计算题

钢铁生锈的过程十分复杂，已知某铁锈含有Fe₂O₃•nH₂O(n≤1)，还可能有Fe(OH)₃和FeCO₃。某学习小组做了以下实验：

①取12.574g铁锈隔绝空气加热至恒重，得到固体10.528g。

②另取6.287g铁锈，在205.00 mL 1.000mol/L的稀硝酸中恰好完全溶解，产生NO气体89.60 mL(标准状况)。

（1）根据实验①，铁锈中是否只含Fe₂O₃•nH₂O？试通过计算回答。

（2）根据实验②，能否确定铁锈中含有FeCO₃？理由是什么？

（3）若n=0.8，试通过计算确定6.287g铁锈的成分以及它们的物质的量。

答案

（共6分）

（1）否;若只含Fe₂O₃•nH₂O，则Fe₂O₃与H₂O的物质的量之比为

10.528÷160/（12.574-10.528）÷18=0.0658：0.114=1：1.72 n＞1，不合题意（2分，合理即可）（2）有，因为只有FeCO₃显还原性（1分，合理即可）

（3）Fe₂O₃•0.8H₂O：0.025 mol；Fe(OH)₃：0.005 mol；FeCO₃：0.012mol（各1分）

完形填空

An elderly carpenter(木匠) was ready to retire. He told his boss his plans to   1  the business and live a more relaxed life with his wife. He would miss the pay, but he needed to retire.
The boss was   2  to see his good worker go, and asked if he could build just one more house as a personal favor. The carpenter said yes,   3  it was easy to see that his heart was not in his work. He used poor skills and   4  materials. It was an unfortunate way to   5  his career.
When the carpenter finished his work, the boss came to   6  the house. After he checked it out, he handed a   7  to the carpenter. “This is your house,” he said. ‘It is my gift to you.”
What a shame！If he knew he was building his own house, the old man would have done it all so   8 .
So it is with all of us. Think of your life as a   9 . Each day you hammer a nail(钉子), place a board, or set up a wall. You must try your best to build the house wisely because it is the only life you will ever have. Your life tomorrow will 10  from the attitudes you choose today.
小题1:.

A．differently

B．difficultly

多项选择题

小叶性肺炎的并发症有()

A．肺脓肿

B．支气管扩张

C．肺心病

D．心力衰竭

E．纤维素性胸膜炎