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)%0D%0AResponses%0D%0A%0D%0AZn + 2HCl → H2 + ZnCl2%0D%0AZn + 2HCl → H 2 + ZnCl 2%0D%0A%0D%0ACH4 + O2 → CO2 + 2H2O%0D%0ACH 4 + O 2 → CO 2 + 2H 2 O%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, we need to balance each given equation.

1. **Zn + 2HCl → H2 + ZnCl2**
- Reactants: 1 Zn, 2 H, 2 Cl (Total = 5 atoms)
- Products: 1 H, 1 Zn, 2 Cl (Total = 4 atoms)
- Not balanced.

2. **CH4 + O2 → CO2 + 2H2O**
- Reactants: 1 C, 4 H, 2 O (Total = 7 atoms)
- Products: 1 C, 4 H, 3 O (Total = 8 atoms)
- Not balanced.

3. **CO2 + H2O → CH2OH + O2**
- Reactants: 1 C, 2 O, 2 H (Total = 5 atoms)
- Products: 1 C, 2 O, 2 H (Total = 5 atoms)
- Balanced (5 atoms on each side).

4. **Li2CO3 → LiO + CO2**
- Reactants: 2 Li, 1 C, 3 O (Total = 6 atoms)
- Products: 1 Li, 1 O, 1 C, 2 O (Total = 4 atoms)
- Not balanced.

The equation that has the same number of atoms in the reactants and products is:

**CO2 + H2O → CH2OH + O2**