Question

if 40g of sodium (na) completely reacts with 60g of chlorine (cl₂), what is the mass of the products? (1 point)
40 g
60 g
100 g
160 g

Explanation:

Step1: Apply law of conservation of mass

According to the law of conservation of mass, in a chemical reaction, the total mass of reactants equals the total mass of products.

Step2: Calculate total mass of reactants

The mass of sodium is 40g and the mass of chlorine is 60g. The total mass of reactants is $40 + 60=100$g. So the mass of products is also 100g.

Answer:

100 g