Question

Question%0D%0AIn which chemical equation is the number of atoms in the reactants the same as the number of atoms in the products?(1 point)%0D%0AResponses%0D%0A%0D%0ACH4 + O2 → CO2 + 2H2O%0D%0ACH 4 + O 2 → CO 2 + 2H 2 O%0D%0A%0D%0AZn + 2HCl → H2 + ZnCl2%0D%0AZn + 2HCl → H 2 + ZnCl 2%0D%0A%0D%0ACO2 + H2O → CH2OH + O2%0D%0ACO 2 + H 2 O → CH 2 OH + O 2%0D%0A%0D%0ALi2CO3 → LiO + CO2

Answer 1

To determine which chemical equation has the same number of atoms in the reactants as in the products, let's analyze each provided equation.

1. **CH4 + O2 → CO2 + 2H2O**
- Reactants: 1 C (from CH4), 4 H (from CH4), 2 O (from O2) = total of 7 atoms.
- Products: 1 C (from CO2), 4 H (from 2H2O), 2 O (from CO2 + 2H2O) = total of 7 atoms.
- The number of atoms is the same.

2. **Zn + 2HCl → H2 + ZnCl2**
- Reactants: 1 Zn, 2 H, 2 Cl = total of 5 atoms.
- Products: 1 H (from H2), 1 Zn (from ZnCl2), 2 Cl (from ZnCl2) = total of 4 atoms.
- The number of atoms is not the same.

3. **CO2 + H2O → CH2OH + O2**
- Reactants: 1 C (from CO2), 2 O (from CO2), 2 H (from H2O) = total of 5 atoms.
- Products: 1 C (from CH2OH), 2 H (from CH2OH), 2 O (from O2) = total of 5 atoms.
- The number of atoms is the same.

4. **Li2CO3 → LiO + CO2**
- Reactants: 2 Li (from Li2CO3), 1 C (from Li2CO3), 3 O (from Li2CO3) = total of 6 atoms.
- Products: 2 Li (from LiO), 1 O (from LiO), 1 C (from CO2), 2 O (from CO2) = total of 5 atoms.
- The number of atoms is not the same.

Both the first equation (CH4 + O2 → CO2 + 2H2O) and the third equation (CO2 + H2O → CH2OH + O2) have the same number of atoms in the reactants and products.

However, since you are likely looking for one correct response, I would recommend selecting the first equation:

**CH4 + O2 → CO2 + 2H2O**.