3.1 Law of Conservation of Mass HW

Front

Matter can not be created nor destroyed: it can only be

Back

Transformed, changed

Front

If reaction starts with 20g of reactants, what is the total mass of products produced?

Back

a total of 20g of products

Front

The Law of Conservation of Mass States

Back

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

Front

Which of the models of a chemical reaction best represents the Law of Conservation of Mass? Options: A, B, C, D

Back

A

Front

Which of the models of a chemical reaction best represents the Law of Conservation of Mass? Options: A, B, C, D

Back

A

Front

Which of the models of a chemical reaction best represents the Law of Conservation of Mass? Options: A, B, C, D

Back

A

Front

A student heated a 10 gram sample of a chemical in an open container. After a reaction, the mass was less. Why? Options: The heat caused the chemical to become less dense. The reaction gave off more heat than was added. Some of the lighter particles were destroyed. Some of the particles escaped as a gas formed.

Back

Some of the particles escaped as a gas formed.

Front

A student dissolved 25 grams of salt into 1,000 grams of water. What should the mass of the saltwater mixture be?

Back

1,025 grams

Front

Why did the mass of an iron nail increase after being heated over a bunsen burner?

Back

Extra particles from the air were added to the nail during burning.

Front

In a reaction A + B ----> C, reactant A has 5g and product C has 9g. How many grams does reactant B have? Options: 4g, 5g, 9g, 14g

Back

4g