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relative atomic mass=121x57.21%+123x42.79% =121.8558

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[ 本帖最後由 蜻蛉 於 2011-9-24 17:40 編輯 ]

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其實只係數學題
比重問題

The antimony was found to have
the following percentage composition
by mass:^121 Sb,57.21%      ^123,42.79%
Caculate a value for the relative atomic
mass
of the antimony.Give your answer
to 4 significant figures

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[ 本帖最後由 蜻蛉 於 2011-9-24 17:46 編輯 ]

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