Science on the Main Stage Lesson 2 Flashcard

Front

Which statement best describes how Makayla knows there was a chemical reaction?

Back

Makayla knows a chemical reaction has taken place because the sodium fizzed.

Front

What is the main difference between a physical and a chemical change?

Back

Physical changes are reversible, chemical changes are not.

Front

Which reaction did Luis carry out between potassium and hydrochloric acid? Options: Reaction A, Reaction B, Reaction C, Reaction D

Back

Reaction B

Front

Law of Conservation of Mass

Back

Mass is never created or destroyed

Front

In reaction A + B --> C, reactants A + B have a total mass of 9g. What is the mass of product C?

Back

9g

Front

Back

4

Front

Why does this picture demonstrate the Law of Conservation of Mass?

Back

the number of atoms of each element are the same on both sides

Front

Back

6

Front

Is this equation balanced?

Back

No

Front

In the equation shown, what are the product(s)?

Back

NH₃