Chemistry Final Review Semester 2

Trail mix can be best classified as a:

• pure substance
• element
• homogeneous mixture
• heterogeneous mixture

Brass, a combination of copper and nickel, is used is many applications such as statues and instruments. What can brass be classified as?

• pure substance
• compound
• homogeneous mixture
• heterogeneous mixture

Tags

NGSS.MS-PS1-3

Density is the mass of a substance per unit of volume. What is the density of an object with a mass of 20 grams and a volume of 5mL?

• .25 g/mL
• 4 g/mL
• 5 g/mL
• .20 g/mL

When something evaporates (turns into a gas), such as water or alcohol, it is considered a chemical change. 

• True
• False

Tags

NGSS.MS-PS1-4

What is the chemical formula for calcium carbonate? 

• CaCO₃
• Ca₂CO₃
• Ca(CO₃)₂
• Ca₃CO₂

Tags

NGSS.MS-PS1-1

Which of the following models best demonstrates a balanced chemical equation?

• F
• G
• H
• J

Tags

NGSS.MS-PS1-5

The reactants are on the left side of the chemical equation.

• True
• False

Tags

NGSS.MS-PS1-5

How many atoms in all are in a molecule of serotonin?

C₁₀H₁₂N₂O

• 22
• 24
• 25
• 4

Tags

NGSS.MS-PS1-1

What is the mass of H₂O in the reaction above?

• 70.01
• 24.11
• 21.44
• 48.22

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The Law of Conservation of Mass states

• that matter exists in all states and reacts the same

• that matter can only be changed into new substances by introducing a catalyst

• that matter exists in the same state throughout any chemical change

• that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants

Tags

NGSS.MS-PS1-5