3.1 Law of Conservation of Mass HW

Front

What does the Law of Conservation of Mass state?

Back

Mass cannot be created nor destroyed, it can only change form.

Front

In a chemical reaction, if reactant AB has a mass of 12g and product B has a mass of 5g, what is the mass of product A?

Back

7g

Front

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

Back

Model A.

Front

What happens to the mass of a sample in a chemical reaction if some particles escape as gas?

Back

The mass of the sample decreases.

Front

What is a common misconception about the Law of Conservation of Mass?

Back

That mass can be created or destroyed during a chemical reaction.

Front

How can the Law of Conservation of Mass be demonstrated in a closed system?

Back

By measuring the mass of reactants before and products after a reaction, which should be equal.

Front

What is an example of a chemical reaction that illustrates the Law of Conservation of Mass?

Back

The reaction of hydrogen and oxygen to form water.

Front

Why is it important to consider the Law of Conservation of Mass in chemical equations?

Back

It ensures that the number of atoms of each element is conserved.

Front

What is the significance of balancing chemical equations?

Back

To reflect the Law of Conservation of Mass by ensuring the same number of each type of atom on both sides.

Front

What is an example of a physical change that does not violate the Law of Conservation of Mass?

Back

Melting ice into water.