In which chemical equation is the number of atoms in the reactants the same as the number of atoms in the products?(1 point)
Responses
Li2CO3 → LiO + CO2
Li 2 CO 3 → LiO + CO 2
CO2 + H2O → CH2OH + O2
CO 2 + H 2 O → CH 2 OH + O 2
CH4 + O2 → CO2 + 2H2O
CH 4 + O 2 → CO 2 + 2H 2 O
Zn + 2HCl → H2 + ZnCl2
Zn + 2HCl → H2 + ZnCl2
The chemical equation in which the number of atoms in the reactants is the same as the number of atoms in the products is:
Zn + 2HCl → H2 + ZnCl2
The chemical equation in which the number of atoms in the reactants is the same as the number of atoms in the products is the third option:
CH4 + O2 → CO2 + 2H2O
To determine the number of atoms in each element, we count the subscripts next to each element in the equation.
In the reactants, CH4 has 1 carbon atom and 4 hydrogen atoms, and O2 has 2 oxygen atoms.
In the products, CO2 has 1 carbon atom and 2 oxygen atoms, and 2H2O has 4 hydrogen atoms and 2 oxygen atoms.
Thus, we see that the number of atoms in the reactants (1 carbon, 4 hydrogen, and 2 oxygen) is the same as the number of atoms in the products (1 carbon, 4 hydrogen, and 2 oxygen) in the equation CH4 + O2 → CO2 + 2H2O.