You are working in the laboratory preparing sodium chloride. Consider the following results for three preparations of the compound:
Case 1: 39.34 g Na + 60.66 g Cl₂ → 100.00 g NaCl
Case 2: 39.34 g Na +70.00 g Cl₂ →
100.00 g NaCI + 9.34 g Cl₂
Case 3: 50.00 g Na + 50.00 g Cl₂ → 82.43 g NaCl + 17.57 g Na
Explain these results in terms of the laws of conservation of mass and definite composition.