问题
计算题
标准状况下,11.2LCO和CO2混合气体质量为20.4g,求混合气体中CO和CO2的体积比和质量比。
答案
体积比:1∶4; 质量比:7∶44
标准状况下,11.2LCO和CO2混合气体质量为20.4g,求混合气体中CO和CO2的体积比和质量比。
体积比:1∶4; 质量比:7∶44
Many years ago,there was a girl. Her name is Molly. One day, Molly went into the forest. She saw some big trees and picked some flowers. Soon she was lost. 小题1: She saw a little house. She ran to the house and knocked on the door(敲门). Nobody answered. 小题2: On a table,there was three bowls and there was some food in them. There were also three small chairs. First,she finished all the food in the smallest bowl and 小题3: She was so heavy,and the chair was broken(坏了). Next,she walked into the bedroom and 小题4: When the three bears(熊) returned,the girl was still asleep. 小题5: Molly opened her eyes and saw them,and ran away without her basket. And she didn’t return to the forest again. 根据短文内容,从方框所给的句子中选择适当的一项填入文中空缺处,使短文完整正确。E用AB表示。
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