CH-2041

Balancing equations

Chemistry · Secondary 4 · Easy · Balancing equations

Iron powder is burned in air to form iron(III) oxide,

Fe_2O_3

. Which balanced equation represents this reaction?

$4Fe + 3O_2 \rightarrow 2Fe_2O_3$
$2Fe + O_2 \rightarrow Fe_2O_3$
$Fe + O_2 \rightarrow Fe_2O_3$
$2Fe + 3O_2 \rightarrow 2Fe_2O_3$

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