4/4 Conservation Laws Quiz

What does the Law of Conservation of Mass state?

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

• Mass can be created but not destroyed in a chemical reaction.

• Mass can be destroyed but not created in a chemical reaction.

• Mass can be both created and destroyed in a chemical reaction.

In a closed system, if the mass of the reactants is 100g before a chemical reaction, what will be the mass of the products after the reaction according to the Law of Conservation of Mass?

• Less than 100g

• More than 100g

• Exactly 100g

• Cannot be determined

Which of the following is an example of the Law of Conservation of Matter in action?

• Evaporation of water

• Burning of paper

• Dissolving sugar in water

• All of the above

The Law of Conservation of Mass applies to which types of reactions?

• Chemical reactions only

• Physical changes only

• Both chemical reactions and physical changes

• Neither chemical reactions nor physical changes

If 20g of hydrogen react with 80g of oxygen to produce water, how much water is produced according to the Law of Conservation of Mass?

• 50g

• 100g

• 150g

• 200g

Why does the Law of Conservation of Mass hold true for chemical reactions in a closed system?

• Because mass is converted into energy

• Because the total mass of reactants and products remains unchanged

• Because new matter is created during the reaction

• Because matter is destroyed during the reaction

What happens to atoms in a chemical reaction according to the Law of Conservation of Matter?

• They are destroyed and new atoms are formed.

• They are rearranged to form new substances.

• They disappear without a trace.

• They increase in number.

Which of the following statements is true according to the Law of Conservation of Mass?

• The mass of products in a chemical reaction can be less than the mass of the reactants if energy is released.

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

• The mass of products in a chemical reaction is always greater than the mass of the reactants.

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

In which scenario would the Law of Conservation of Mass appear to be violated?

• When a candle burns and its wax seems to disappear.

• Mixing vinegar and baking soda to produce gas.

• Freezing water into ice.

• None of the above, as the law is never violated.

How does the Law of Conservation of Matter relate to recycling processes?

• It doesn't; recycling is a physical process unrelated to the law.

• Recycling breaks down matter, thus violating the law.

• Recycling demonstrates the law by showing how materials can be transformed and reused without losing mass.

• Recycling creates new matter, thus providing an exception to the law.