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 CH4 + O2 → CO2 + 2H2O CH 4 + O 2 → CO 2 + 2H 2 O CO2 + H2O → CH2OH + O2 CO 2 + H 2 O → CH 2 OH + O 2 Zn + 2HCl → H2 + ZnCl2 Zn + 2HCl → H 2 + ZnCl 2 Li2CO3 → LiO + CO2

Answer 1

To determine which of the provided chemical equations has the same number of atoms in the reactants as in the products, we can analyze each equation.

1. **CH₄ + O₂ → CO₂ + 2H₂O**
- Reactants: C = 1, H = 4, O = 2 (Total = 1 + 4 + 2 = 7 atoms)
- Products: C = 1, H = 4, O = 4 (Total = 1 + 4 + 4 = 9 atoms)

2. **CO₂ + H₂O → CH₂OH + O₂**
- Reactants: C = 1, O = 2, H = 2 (Total = 1 + 2 + 2 = 5 atoms)
- Products: C = 1, O = 2, H = 6 (Total = 1 + 2 + 6 = 9 atoms)

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

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

Now, summarizing the counts:

- For the first equation, **7 vs. 9** atoms.
- For the second equation, **5 vs. 9** atoms.
- For the third equation, **5 vs. 5** atoms.
- For the fourth equation, **6 vs. 5** atoms.

The only equation where the number of atoms is equal in reactants and products is:

**Zn + 2HCl → H₂ + ZnCl₂**

So the answer is this equation.