Question

a chemical equation is shown. 2h₂o₂ → 2h₂o + o₂ liquid hydrogen peroxide liquid water oxygen gas which statement correctly compares the number of atoms in the reactant and in the products? the total number of atoms in the hydrogen peroxide molecules is equal to the total number of atoms in the liquid water and oxygen gas molecules. the total number of atoms in the hydrogen peroxide molecules is equal to the total number of atoms in the molecule of liquid water. the number of atoms in each molecule of hydrogen peroxide is equal to the number of atoms in each molecule of oxygen gas. the number of atoms in each molecule of liquid water is equal to the number of atoms in each molecule of oxygen gas.

Explanation:

Step1: Count atoms in reactants

In $2H_2O_2$, there are $2\times(2 + 2)=8$ atoms (4 hydrogen and 4 oxygen).

Step2: Count atoms in products

In $2H_2O+O_2$, in $2H_2O$ there are $2\times(2 + 1)=6$ atoms (4 hydrogen and 2 oxygen), and in $O_2$ there are 2 oxygen atoms. So in total, there are $6 + 2=8$ atoms.

Answer:

The total number of atoms in the hydrogen peroxide molecules is equal to the total number of atoms in the liquid water and oxygen gas molecules.