In which chemical equation is the number of atoms in the reactants the same as the number of atoms in the products?(1 point)
a.CH4 + O2 → CO2 + 2H2O
CH, 4, + O, 2, → CO, 2, + 2H, 2, O
b.cZn + 2HCl → H2 + ZnCl2
Zn + 2HCl → H, 2, + ZnCl, 2
c.CO2 + H2O → CH2OH + O2
CO, 2, + H, 2, O → CH, 2, OH + O, 2
d.Li2CO3 → LiO + CO2
To determine which chemical equation has the same number of atoms in the reactants as in the products, we need to count the number of each type of atom on both sides of the equation.
Let's go through each option:
a. CH4 + O2 → CO2 + 2H2O
Counting the atoms on the reactant side:
Carbon (C): 1
Hydrogen (H): 4
Oxygen (O): 2
Counting the atoms on the product side:
Carbon (C): 1
Hydrogen (H): 4
Oxygen (O): 4
Since the number of oxygen atoms differs, option a is not the correct answer.
b. Zn + 2HCl → H2 + ZnCl2
Counting the atoms on the reactant side:
Zinc (Zn): 1
Hydrogen (H): 2
Chlorine (Cl): 2
Counting the atoms on the product side:
Zinc (Zn): 1
Hydrogen (H): 2
Chlorine (Cl): 2
In this equation, the number of atoms on both sides is the same for each element, so option b is the correct answer.
c. CO2 + H2O → CH2OH + O2
Counting the atoms on the reactant side:
Carbon (C): 1
Hydrogen (H): 2
Oxygen (O): 3
Counting the atoms on the product side:
Carbon (C): 1
Hydrogen (H): 3
Oxygen (O): 3
The number of hydrogen atoms is different on both sides, so option c is not the correct answer.
d. Li2CO3 → LiO + CO2
Counting the atoms on the reactant side:
Lithium (Li): 2
Carbon (C): 1
Oxygen (O): 3
Counting the atoms on the product side:
Lithium (Li): 1
Oxygen (O): 3
Carbon (C): 1
The number of lithium atoms is different on both sides, so option d is not the correct answer.
Therefore, the chemical equation in which the number of atoms in the reactants is the same as the number of atoms in the products is option b: Zn + 2HCl → H2 + ZnCl2.