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
Zn + 2HCl → H2 + ZnCl2
Zn + 2HCl → H 2 + ZnCl 2
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
CH4 + O2 → CO2 + 2H2O
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
To determine the chemical equation in which the number of atoms in the reactants is the same as the number of atoms in the products, we need to balance the equation. Balancing a chemical equation involves adjusting the coefficients in front of the reactants and products to ensure that the number of atoms on both sides of the equation are equal.
Looking at the options provided:
1) Zn + 2HCl → H2 + ZnCl2:
This equation is not balanced because there are 2 hydrogen atoms in HCl on the reactant side, but only 1 hydrogen atom in H2 on the product side.
2) Li2CO3 → LiO + CO2:
This equation is not balanced because there are 2 lithium atoms in Li2CO3 on the reactant side, but only 1 lithium atom in LiO on the product side.
3) CO2 + H2O → CH2OH + O2:
This equation is not balanced because there are 2 oxygen atoms in CO2 on the reactant side, but only 1 oxygen atom in O2 on the product side.
4) CH4 + O2 → CO2 + 2H2O:
This equation is balanced because the number of atoms on both sides of the equation are equal. There is 1 carbon atom, 4 hydrogen atoms, and 2 oxygen atoms on both the reactant and product sides of the equation.
Therefore, the correct answer is:
CH4 + O2 → CO2 + 2H2O