Chemistry Exam Review II

Which problem is balanced?

• PbO₂ + 2H₂
• SO₂ + H₂0 --> H₂SO₄
• 2Na + 2H₂O --> 2NaOH + H₂

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Balance this equation
_Zn+_HCl-->_ZnCl₂ +_H₂

• 1,1,2,1
• 1,1,1,2
• 1,2,1,1
• 2,1,1,1

Tags

NGSS.MS-PS1-5

Balance this equation.
_Mg + _Cl₂ --> _MgCl₂

• 1, 2,1
• already balanced
• 2,1,1
• 1,1,2

Tags

NGSS.MS-PS1-5

Balance this equation:
MgCl₂ --> Mg₄+ Cl₂

• It's already balanced.
• 4MgCl₂ --> Mg₄+ 4Cl₂
• 4MgCl₂ --> Mg₄+ 5Cl₂

Tags

NGSS.MS-PS1-5

What type of reaction is below?

Cu₂O + K --> K₂O + Cu

• Combination/Synthesis

• Decomposition

• Double Replacement

• Combustion

• Single Replacement

Predict the products of this reaction: MgO + Li --> ?

• LiO + Mg

• MgO + Li

• Li₂O + Mg

• LiMg + O

• MgLi + O

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Predict the products: C₂H₆ + O₂ --> ?

• H₂O + O₂

• CO₂ + H₂O

• C + O₂

• CO₂ + H₂O₂

• CH + O₂

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Which number should go in the blank?
_ H₂ + O₂ -> 2 H₂O

• 1
• 2
• 3
• 0

Tags

NGSS.MS-PS1-5

How many protons are in Cl?

• 35

• 18

• 17

• 52

Tags

NGSS.MS-PS1-1

How many neutrons are in P if it has a mass of 31?

• 16

• 15

• 31

• 46

Tags

NGSS.MS-PS1-1