Bell Ringer 3-7-24

What does the Law of Conservation of Mass state?

• The mass of products is always less than the mass of reactants.

• The mass of reactants is always less than the mass of products.

• Matter can be created and destroyed in a chemical reaction.

• Matter can neither be created nor destroyed in a chemical reaction.

According to the Law of Conservation of Mass, in a closed system, the mass of the reactants compared to the mass of the products is:

• Greater than the mass of the products

• Less than the mass of the products

• Equal to the mass of the products

• Unpredictable without further information

In a chemical reaction, if the total mass of the reactants is 100g, what is the total mass of the products?

• Less than 100g

• More than 100g

• 100g

• Cannot be determined without knowing the reactants

Which of the following is a correct interpretation of the Law of Conservation of Mass?

• The total mass in an isolated system can change during a chemical reaction.

• The mass of the products in a chemical reaction can be different from the mass of the reactants if energy is absorbed.

• The mass of the products in a chemical reaction is always equal to the mass of the reactants.

• Mass can be created during a chemical reaction if the conditions are right.

When 50g of sodium reacts with 35g of chlorine, the total mass of the sodium chloride produced will be:

• 85g

• Less than 85g

• More than 85g

• Cannot be determined without more information

According to the procedures in "The Law of Conservation of Mass in a Chemical Reaction" OLABS, which of the following are the REACTANTS in the lab?

https://amrita.olabs.edu.in/?sub=73&brch=2&sim=118&cnt=2

• BaCl₂

• Na₂SO₄

• BaSO₄

• NaCl

Name the molecule BaCl₂

• dibarium chloride

• barium sulfate

• barium chloride

• barium trichloride

Name the molecule Na₂SO₄

• sodium chloride

• sodium sulphate

• sodium tetrasulfide

• disodium disulfate

According to the procedures in "The Law of Conservation of Mass in a Chemical Reaction" OLABS, which of the following are the PRODUCTS in the lab?

https://amrita.olabs.edu.in/?sub=73&brch=2&sim=118&cnt=2

• BaCl₂

• Na₂SO₄

• BaSO₄

• NaCl