4FeS + 7O2 → 2Fe2O3 + 4SO2
Which statement accurately describes the chemical equation?
(1 point)
Responses

It is balanced because the mass of the reactants equals the mass of the products.
It is balanced because the mass of the reactants equals the mass of the products.

It is unbalanced because the mass of the reactants exceeds the mass of the products.
It is unbalanced because the mass of the reactants exceeds the mass of the products.

It is unbalanced because the sum of the coefficients of the reactants exceeds the sum of the coefficients of the products.
It is unbalanced because the sum of the coefficients of the reactants exceeds the sum of the coefficients of the products.

It is balanced because the total coefficients of the reactants are greater than the total coefficients of the products.
It is balanced because the total coefficients of the reactants are greater than the total coefficients of the products.
The correct statement is: It is balanced because the mass of the reactants equals the mass of the products.
Explane it
This statement is accurate because a balanced chemical equation means that the number and type of atoms on both sides of the equation are equal. In this case, the reactants are 4FeS and 7O2, and the products are 2Fe2O3 and 4SO2. By counting the number of each type of atom on both sides of the equation, we can see that the equation is balanced.
On the reactant side, there are 4 iron (Fe) atoms, 4 sulfur (S) atoms, and 14 oxygen (O) atoms (from 7 oxygen molecules). On the product side, there are 4 iron (Fe) atoms, 6 oxygen (O) atoms (from 3 oxygen molecules), and 4 sulfur (S) atoms.
Therefore, the number and type of atoms are equal on both sides of the equation, so it is balanced. Additionally, the total mass of the reactants is equal to the total mass of the products in a balanced equation.
To determine if a chemical equation is balanced, you need to ensure that the number of atoms of each element on the reactant side is equal to the number of atoms of each element on the product side.
Let's start by counting the number of atoms for each element in the equation:
On the reactant side:
Fe: 4 atoms
S: 4 atoms
O: 14 atoms (7 from O2)
On the product side:
Fe: 4 atoms
O: 10 atoms (5 from Fe2O3)
S: 4 atoms (4 from SO2)
Comparing the number of atoms of each element on both sides, we can see that the number of Fe and S atoms are equal. However, the number of O atoms is not equal.
To balance the equation, we need to adjust the coefficients in front of the reactants and products. In this case, the coefficients need to be adjusted so that the number of O atoms on both sides are equal.
To balance the O atoms, we can multiply the O2 by 3, resulting in 21 O atoms on both sides:
4FeS + 7O2 → 2Fe2O3 + 4SO2
Now, let's count the number of atoms for each element again:
On the reactant side:
Fe: 4 atoms
S: 4 atoms
O: 21 atoms (7 from O2)
On the product side:
Fe: 4 atoms
O: 21 atoms (10.5 from Fe2O3)
S: 4 atoms (4 from SO2)
Now that the number of atoms for each element is equal on both sides, we can conclude that the equation is balanced.
Based on this information, the correct statement is:
It is balanced because the mass of the reactants equals the mass of the products.