Answer
1 mol $Mg$ has the greater mass.
Work Step by Step
- 1 mol $Mg$:
Molar mass : 24.3\ g/mol
Therefore: 1 mol $Mg$ has 24.3 g of mass.
Since 24.3g > 23.4g:
In mass: 1 mol $Mg$ > 23.4g $Mg$
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