Question

The oxidation of magnesium to form magnesium oxide is shown by which balanced chemical equation?

Answer 1

magnesium oxide is: MgO (right side)

so the left side is: Mg + O2

for the equation to be balanced there must be two oxygens on both sides

Mg + O2 = 2MgO

but now the magnesium is uneven, so there must be two magnesiums on each side

the answer is: B) 2Mg + O2 = 2MgO

Answer 2

Answer : The correct balanced chemical reaction will be,

(B) $2Mg(s)+O_2(g)\rightarrow 2MgO(s)$

Explanation :

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.

If the amount of atoms of each type on the left and right sides of a reaction differs then to balance the equation by adding coefficient in the front of the elements or molecule or compound in the chemical equation.

Synthesis reaction : A chemical reaction where multiple substances or reactants combine to form a single product.

It is represented as,

$X+Y\rightarrow XY$

The balanced chemical reaction will be,

$2Mg(s)+O_2(g)\rightarrow 2MgO(s)$