A项为啥错,B项为啥对?
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A项为啥错,B项为啥对?
A项为啥错,B项为啥对?
A项为啥错,B项为啥对?
a错,在标准状况下氟化氢是液体,不能用气体摩尔体积来算.b对,因为丙烯和乙烯可以看成(ch2)n,这种情况计算就可以以上式为基本,即7克ch2为0.5摩尔,所以氢原子为0.5乘2.不懂再问