Chem F3 Review

Classify

Zn + H₂S → ZnS + H₂

• formation

• combustion

• single replacement

• double replacement

Classify
CH₄ + O₂ → CO₂ + H₂O 

• single replacement
• double replacement
• synthesis
• combustion

2HCl + 2NaOH -----> NaCl + H₂O

• synthesis reaction

• decomposition reaction

• single replacement reaction

• double replacement reaction

2H₂ + O₂ ---->2H₂O

• formation reaction

• decomposition reaction

• single replacement reaction

• double replacement reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is a sign that a chemical reaction has occurred?

• change in shape
• melting
• formation of a gas
• dissolving

Tags

NGSS.MS-PS1-2

What type of reaction is this?
C₃H₆O + 4 O₂ -->3 CO₂ + 3 H₂O 

• single replacement
• synthesis
• combustion
• decombustion

What reaction requires the presence of oxygen?

• Decomposition
• Combustion
• Double Replacement
• Desalination

In a ___________change, a substance changes into a different substance.

• Physical

• Chemical

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

What term is given to a reaction which transfers heat energy to the surroundings?

• Endothermic

• Reversible

• Exothermic

• Exotermic

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4