4FeS + 7O2 → 2Fe2O3 + 4SO2

Question

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.

Answer 1

The correct statement is: It is balanced because the mass of the reactants equals the mass of the products.

Answer 2

Explane it

Answer 3

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.