Question

Write the balanced chemical equations for the following word equations:

$\left(c\right).\text{Magnesium}+\text{oxygen}\to \text{Magnesium oxide}$

Answer 1

The skeletal equation is:
$Mg+O_2\to MgO$

Count the number of atoms of each element on either side of the reaction

• Number of atoms on reactant side:

$Mg=1,O=2$

• Number of atoms on the product side:

$Mg=1,O=1$

• To equalize $O$, multiply $MgO$ by $2$.

$Mg+O_2\to 2MgO$

• To equalize $Mg$, multiply $Mg$ by $2$.

$2Mg+O_2\to 2MgO$

Therefore, the balanced chemical equation for the reaction is:
$2Mg+O_2\to 2MgO$