Final answer:
To balance the equation, 2 NaCl reacts with 2 H2O to produce 2 NaOH, 1 H2, and 1 Cl2. Also, when 332 atoms of Na react, 166 molecules of H2 are produced as per the balanced equation.
Step-by-step explanation:
To balance the chemical equation, we need to ensure that the number of atoms of each element on the reactant side is equal to the number on the product side. There seems to be a typo in the student's provided equation, so I will assume it's meant to be a combination of the sodium chloride reaction with water to form sodium hydroxide, hydrogen gas, and chlorine gas:
Unbalanced Equation: NaCl(aq) + H2O(l) → NaOH(aq) + H2(g) + Cl2(g)
Let's balance it:
Balance Na: 2 NaCl + H2O → 2 NaOH + H2 + Cl2
Balance Cl: 2 NaCl + H2O → 2 NaOH + H2 + Cl2
Balance O and H: 2 NaCl + 2 H2O → 2 NaOH + H2 + Cl2
The equation is now balanced with 2 moles of sodium chloride reacting with 2 moles of water to produce 2 moles of sodium hydroxide, 1 mole of hydrogen gas, and 1 mole of chlorine gas.
When 332 atoms of Na react, there will be 166 molecules of H2 produced because 2 atoms of Na produce 1 molecule of H2 as demonstrated in the balanced equation. Since 2 Na reacts with 2 H2O to form 1 H2, then 332 Na will react to form 166 H2 molecules.