Question

determine whether the following equation is balanced- 2 h2 + o2 → 2 h2o
the equation is not balanced because there are four atoms of water in the products and reactants.
the equation is not balanced because there are more hydrogen atoms in the products than the reactants.
the equation is not balanced because there are more oxygen atoms in the reactants than the products.
the equation is balanced.

Explanation:

Step1: Count hydrogen atoms

On the reactant - side: In $2H_2$, the number of hydrogen atoms is $2\times2 = 4$. On the product - side: In $2H_2O$, the number of hydrogen atoms is $2\times2=4$.

Step2: Count oxygen atoms

On the reactant - side: In $O_2$, the number of oxygen atoms is 2. On the product - side: In $2H_2O$, the number of oxygen atoms is $2\times1 = 2$.

Answer:

The equation is balanced.