Final answer:
The chemical equations provided are reviewed for balance. Equations a, c, and d are not balanced, while equation b is balanced. Balancing equations ensures equal numbers of atoms for each element on both sides.
Step-by-step explanation:
Classifying each of the following equations as balanced or not balanced relies on verifying if there are equal numbers of each type of atom on both sides of the equation. A balanced equation has the same number of atoms of each element on both sides, while an unbalanced equation does not.
- a. SO2(g) + O2(g) → SO3(g) - This equation is not balanced because there are two oxygen atoms on the left but three on the right side.
- b. CO(g) + 2H2(g) → CH3OH(l) - This equation is balanced with one carbon atom, four hydrogen atoms, and one oxygen atom on both sides.
- c. 3NO2(g) + H2O(l) → NO(g) + 2HNO3(aq) - This equation is not balanced; there are discrepancies in the number of nitrogen and oxygen atoms.
- d. 2NO2(g) + 7H2(g) → 2NH3(g) + 4H2O(g) - This equation is also not balanced because the number of oxygen and hydrogen atoms does not match on both sides.