2) (UFAC) A massa molecular do composto

(UFAC) A massa molecular do composto $\mathrm{Na}_{2} \mathrm{SO}_{4} \cdot 3 \mathrm{H}_{2} \mathrm{O}$ é ( Dados: $\mathrm{H}=1 \mathrm{u} \cdot \mathrm{O}=16 \mathrm{u}$ , $\mathrm{Na}=23 u$ e $S=32 u$ ). (a) $142 u$ (b) $196 u$ (c) $426 u$ (d) $444 u$ (e) $668 u$

$2) (UFAC) A massa molecular do composto $ \mathrm{Na}_{2} \mathrm{SO}_{4} \cdot 3 \mathrm{H}_{2} \mathrm{O} $ é ( Dados: $ \mathrm{H}=1 \mathrm{u} \cdot \mathrm{O}=16 \mathrm{u} $, $ \mathrm{Na}=23 u $ e $ S=32 u $ ). (a) $ 142 u $ (b) $ 196 u $ (c) $ 426 u $ (d) $ 444 u $ (e) $ 668 u $$

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