挑战习题
1/5单选题
难度:

1.将30克铁片放入CuSO4溶液中片刻后,取出称量铁片质量为31.6克,求参加反应的铁的质量为_____
A11.1g
B10.2g
C13.3g
D11.2g
提示1:
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提示2:
LuWIqeeUqOWPjeW6lOeahOWMluWtpuaWueeoi+W8j++8jOagueaNrumTgeeJh+i0qOmHj+WinuWKoOmHj+WPr+axguW+l+WPguWKoOWPjeW6lOeahOmTgeeahOi0qOmHjzs=
正确答案:RA==
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