3.1 Law of Conservation of Mass HW

Front

What does the Law of Conservation of Mass state?

Back

The Law of Conservation of Mass states that in a closed system, the mass of the reactants must equal the mass of the products in a chemical reaction.

Front

What is mass?

Back

Mass is a measure of the amount of matter in an object, typically measured in grams or kilograms.

Front

Which model best represents the Law of Conservation of Mass in a chemical reaction?

Back

Model A best represents the Law of Conservation of Mass.

Front

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

Back

False. Gases have mass and must be accounted for in the conservation of mass.

Front

In the reaction A + B -> C, if A has 5g and C has 9g, how much does B weigh?

Back

B weighs 4g.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.

Front

What is a reactant in a chemical reaction?

Back

A reactant is a substance that undergoes change during a chemical reaction.

Front

What is a product in a chemical reaction?

Back

A product is a substance that is formed as a result of a chemical reaction.

Front

How can you demonstrate the Law of Conservation of Mass in a laboratory experiment?

Back

By measuring the mass of reactants before a reaction and the mass of products after the reaction, ensuring they are equal.

Front

What happens to the mass of reactants in a closed system during a chemical reaction?

Back

The mass of the reactants remains constant and equals the mass of the products.