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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 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

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To determine which chemical equation has the same number of atoms in the reactants as in the products, we need to count the total number of atoms on both sides of the equation for each option.

  1. CH4 + O2 → CO2 + 2H2O

    • Reactants: 1 C (in CH4) + 4 H (in CH4) + 2 O (in O2) = 7 atoms.
    • Products: 1 C (in CO2) + 2 O (in CO2) + 4 H (in 2H2O) = 7 atoms.
    • Both sides have 7 atoms.

  2. Zn + 2HCl → H2 + ZnCl2

    • Reactants: 1 Zn + 2 H + 2 Cl = 5 atoms.
    • Products: 1 H + 1 Zn + 2 Cl = 4 atoms.
    • Not balanced.

  3. Li2CO3 → LiO + CO2

    • Reactants: 2 Li + 1 C + 3 O = 6 atoms.
    • Products: 2 Li + 1 C + 2 O = 5 atoms.
    • Not balanced.

  4. CO2 + H2O → CH2OH + O2

    • Reactants: 1 C + 2 O + 2 H = 5 atoms.
    • Products: 1 C + 2 O + 2 H = 5 atoms.
    • Both sides have 5 atoms.

From the options analyzed, the equations that have the same number of atoms in reactants and products are:

  • CH4 + O2 → CO2 + 2H2O
  • CO2 + H2O → CH2OH + O2

Therefore, the correct answer contains CH4 + O2 → CO2 + 2H2O, which is one of the equations with balanced atom counts.