Question

How many atoms of oxygen are there on each side of the chemical equation \[2Mg{\text{ }} + O\] \[ \to \] \[2MgO\]?

Answer 1

Hint: A balanced chemical equation, the total number of atoms of each element in the reactants, on the left-hand side of the equation is the same as the number atoms in the products framed on the right-hand side of the equation
The complete mass of the reactants is equivalent to the absolute mass of the products.
The number of atoms of each element, before the reaction and after the reaction is equivalent.

Complete step by step answer:
Here,
\[2Mg{\text{ }} + O\] \[ \to \] \[2MgO\]
Means,
Two atoms of magnesium, in addition to one oxygen atom (consisting of two atoms of oxygen) react to become two particles of magnesium oxide, every one of which contains oxygen.
Since the \[{O_2}\] particle has two oxygens, and two\[\;MgO's\] each have one oxygen, there are two oxygens on each side.

Note:
Each chemical equation sticks to the law of conservation of mass, which expresses that matter can't be made or destroyed. In this manner, there should be a similar number of atoms of every element on each side of a chemical equation.
Use coefficients of products and reactants to adjust the number of atoms of an element on the two sides of a chemical equation.
At the point when an equivalent number of atoms of an element is available on the both sides of a chemical equation, the equation is balanced.
the law of conservation of mass Matter can't be created nor be destroyed . Hence, in a closed system, the mass of the reactants should approach the mass of the products.