Hello, I'm Lily. I have a friend. Her name's Sally. She's eleven. Her birthday is on 10th July. She lives far from school. She goes to school by bus. Her favourite colour is red. She has a red hat. She can read and write. She is good at writing. She wants to be a teacher in the future. She wants to teach Chinese in a school.

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             comes after autumn .

向22.4gFe₂O₃、Cu的混合物中加入0.5mol/L的硫酸溶液600mL，固体恰好完全溶解，所得溶液中不含Fe³⁺，若用过量的CO在高温下还原相同质量的原混合物，则固体剩余的质量为（   ）