Question

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 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 Li2CO3 → LiO + CO2

Answer 1

To determine which chemical equation has the same number of atoms in the reactants and products, we need to count the number of atoms for each element in both sides of the equations provided.

1. **Zn + 2HCl → H2 + ZnCl2**
- Reactants: 1 Zn, 2 H, 2 Cl → Total = 1 + 2 + 2 = 5 atoms
- Products: 1 H, 1 Zn, 2 Cl → Total = 2 + 1 + 2 = 5 atoms

2. **CO2 + H2O → CH2OH + O2**
- Reactants: 1 C, 2 O, 2 H → Total = 1 + 2 + 2 = 5 atoms
- Products: 1 C, 2 O, 2 H → Total = 1 + 2 + 2 = 5 atoms

3. **CH4 + O2 → CO2 + 2H2O**
- Reactants: 1 C, 4 H, 2 O → Total = 1 + 4 + 2 = 7 atoms
- Products: 1 C, 4 H, 2 O → Total = 1 + 2 + 4 = 7 atoms

4. **Li2CO3 → LiO + CO2**
- Reactants: 2 Li, 1 C, 3 O → Total = 2 + 1 + 3 = 6 atoms
- Products: 1 Li, 1 C, 3 O → Total = 1 + 1 + 3 = 5 atoms

From the analysis:
The first equation, **Zn + 2HCl → H2 + ZnCl2**, has an equal number of atoms in the reactants and products.

The correct response is:
**Zn + 2HCl → H2 + ZnCl2**.