14. Which of the following statements are true according to the law of conservation of mass in chemical reactions? Select all that apply!(3 points)

Question

Responses

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

During a chemical reaction, mass is created or destroyed.
During a chemical reaction, mass is created or destroyed.

The number of atoms of each element remains the same before and after the reaction.
The number of atoms of each element remains the same before and after the reaction.

Chemical reactions can change the type of atoms involved, but not their total mass.
Chemical reactions can change the type of atoms involved, but not their total mass.

If a chemical reaction occurs in an open container, some mass may be lost to the surroundings..

Answer 1

According to the law of conservation of mass in chemical reactions, the following statements are true:

1. The total mass of the reactants is equal to the total mass of the products in a chemical reaction.

2. The number of atoms of each element remains the same before and after the reaction.

3. Chemical reactions can change the type of atoms involved, but not their total mass.

The following statements are false:

2. During a chemical reaction, mass is created or destroyed. (This contradicts the law of conservation of mass.)

3. If a chemical reaction occurs in an open container, some mass may be lost to the surroundings. (This is not a violation of the law, but rather a practical consideration; mass is not "lost" in the chemical sense, but can be accounted for as escaping into the environment.)

So, the true statements according to the law of conservation of mass are 1, 3, and 4.