Question

What coefficients are required to balance the following equation?
$Fe+O_2\to FeO$

• A. $2,1,2$
• B. $1,1,1$
• C. $4,2,4$
• D. $2,1,1$

Answer 1

The correct option is A $2,1,2$

Left side Oxygen is $2$ but right side only $1$. Balance Oxygen by putting $2$ before $FeO.$

$Fe+O_2⟶2FeO$

But, $Fe$ on right side is $2$ now, but left side only $1$. Balance $Fe$ by writing $2$ before $Fe$.

$2Fe+O_2⟶2FeO$

Total reaction balanced . So, coefficient are $2,1,2$.