Final answer:
The mass of Chlorine gas produced in the reaction of 10g Sodium Chloride to form 2.5g Sodium metal is 7.5g, following the law of conservation of mass.
Step-by-step explanation:
To calculate the amount of Chlorine gas produced from 10g of Sodium Chloride (NaCl) when it reacts to form 2.5g of Sodium metal (Na) and Chlorine gas (Cl2), we can use the law of conservation of mass. This law states that the mass of the reactants in a chemical reaction must equal the mass of the products. Given that the Sodium Chloride is fully reacting and assuming no other products are formed, the mass of Chlorine gas produced can be determined by subtracting the mass of Sodium metal from the mass of Sodium Chloride.
The mass of Chlorine gas produced is: 10g (initial mass of Sodium Chloride) - 2.5g (mass of Sodium metal) = 7.5g of Chlorine gas.