题目

向一定量的Fe,FeO,Fe2O3,Fe3O4的混合溶液中,加入150mL4mol/L的稀硝酸,恰好使混合物完全溶解,并放出标准状况下NO气体2.24L,往所得溶液中加KSCN溶液,无红色出现。若用一定量的氢气在加热条件下还原相同质量的该混合物,所得固体的物质的量可能为                                                                               A.0.32 mol    B.0.30mol       C.0.28mol      D.0.22 mol 五、 从Ⅱ栏中选出与i栏相对应的答句,将序号写在题前的括号内。I                                 Ⅱ() 1. Where is Sam?                A. I'm sorry.() 2. Don’t sleep.                B. He's in the library.() 3. Is this your pencil?            C. Thank you.() 4. Look at my new skirt.           D. How nice!() 5. What's that in the tree?         E. It's a bird.() 6. Here you are.                F. Yes,it is.
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