Law Of Conservation Mass

Question 1

What does the law of conservation of mass state?

Answer 1

Answer:
The law of conservation of mass states that in a chemical reaction, mass is neither created nor destroyed. The total mass of the reactants is always equal to the total mass of the products.

Question 2

If 10 grams of reactants are used in a chemical reaction, how much mass should the products have?

Answer 2

Answer:
The products should also have 10 grams of mass. According to the law of conservation of mass, the mass of the reactants equals the mass of the products.

Question 3

In a closed container, 20 grams of hydrogen reacts with 16 grams of oxygen to form water. What is the mass of the water produced?

Answer 3

The mass of the water produced is 36 grams (20 g of hydrogen + 16 g of oxygen = 36 g of water).

The mass is conserved in the reaction.

Question 4

If a chemical reaction occurs and some of the products escape as gas, how would that affect the mass balance in an open system?

Answer 4

Answer:
If some products escape as gas in an open system, the mass of the products measured in the system will be less than the mass of the reactants.

However, if the system were closed, the total mass of reactants and products would still be equal.

Question 5

How can the law of conservation of mass be applied to explain why chemical reactions do not violate the principle of mass balance?

Answer 5

Answer:

The law of conservation of mass ensures that the total mass before and after a chemical reaction remains constant.

This means that, even if reactants change forms (e.g., gas, liquid, solid), the total mass is conserved, explaining why chemical reactions adhere to mass balance principles.