Final answer:
Each provided chemical equation is already balanced, with the correct number of each type of atom on both sides of the reaction.
Step-by-step explanation:
The task is to determine whether each chemical equation provided is balanced. A balanced chemical equation has the same number of atoms of each element on both sides of the reaction.
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- a. 2Na(s) + O₂(g) → 2Na₂O(s) - This equation is balanced as there are 4 sodium atoms and 2 oxygen atoms on both sides.
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- b. CH4(g) + 2O2(g) → CO₂(g) + 2H₂O(l) - This equation is balanced as there is 1 carbon atom, 4 hydrogen atoms, and 4 oxygen atoms on both sides of the equation.
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- c. AgNO3(aq) + 2KCl(aq) → AgCl(s) + KNO3(aq) - This equation is balanced with 1 silver atom, 1 nitrogen atom, 3 chlorine atoms, and 1 potassium atom on both sides.
For example, in equation b, to balance the number of hydrogen atoms, we have two molecules of water forming, thus ensuring both sides have an equal number of hydrogen and oxygen atoms.