Intro - Law of Conservation of Mass Review

Front

What is the Law of Conservation of Mass?

Back

The Law of Conservation of Mass states that in a closed system, mass is neither created nor destroyed during a chemical reaction; it is conserved.

Front

Which of the following is not a chemical reaction?

Back

Melting of ice.

Front

What happens to the mass of reactants and products in a chemical reaction according to the Law of Conservation of Mass?

Back

The mass of the reactants equals the mass of the products.

Front

True or False: Gases produced in a reaction do not need to be accounted for because they weigh nothing.

Back

False.

Front

What can matter be transformed into according to the Law of Conservation of Mass?

Back

Matter can only be transformed or changed, not created or destroyed.

Front

What is an example of a chemical reaction?

Back

Burning of wood.

Front

What is the significance of model A in representing chemical reactions?

Back

Model A best represents the Law of Conservation of Mass by showing that mass is conserved during the reaction.

Front

What will weigh more when a chemical change is complete?

Back

They both will weigh the same.

Front

What is a common misconception about the weight of gases in chemical reactions?

Back

Many believe that gases produced weigh nothing, but they actually have mass and must be accounted for.

Front

Define a chemical reaction.

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.