\( \mathrm{Na}_{2} \mathrm{CO}_{3}+\mathrm{Fe}_{2} \mathrm{O}_{3} \stackrel{\Delta}{\longrightar...

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\( \mathrm{Na}_{2} \mathrm{CO}_{3}+\mathrm{Fe}_{2} \mathrm{O}_{3} \stackrel{\Delta}{\longrightarrow} A+\mathrm{CO}_{2} \) what is \( A \) in the reaction?
(a) \( \mathrm{NaFeO}_{2} \)
(b) \( \mathrm{Na}_{3} \mathrm{FeO}_{3} \)
\( \mathrm{P} \)
(c) \( \mathrm{Fe}_{3} \mathrm{O}_{4} \)
(d) \( \mathrm{Na}_{2} \mathrm{FeO}_{2} \)
W
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