Chapter 7 Review

How do we know a chemical reaction has taken place?

• Substances change in appearance

• Substances change in size

• Substances change in states, like from a liquid into a solid.

• New substances are formed

Tags

NGSS.MS-PS1-2

Which of the following is a reactant in the following equation?

O₂ + C₆H₁₂O₆ > CO₂ + H₂O

• CO₂

• H₂O

• O₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is a reactant in the following equation?

O₂ + C₆H₁₂O₆ > CO₂ + H₂O

• CO₂

• H₂O

• O₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Predict the products for the this reaction:
K + HCl --> 

• KCl + H2
• KHCl 
• KH + Cl2
• KCl + H

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following equations represents the balanced synthesis reaction of iron (III) and oxygen?

• Fe + 3 O₂ → Fe₂O₃
• 3 Fe + 3 O₂ → 2 Fe₂O₃
• 2 Fe + O₂ → Fe₂O₃
• 4 Fe + 3 O₂ → 2 Fe₂O₃

Tags

NGSS.MS-PS1-5

If an element is diatomic it should have a subscript of___

• 2, always
• 2, only when it is by itself
• it shouldn't have a subscript, it should have a coefficent

What kind of reaction is this:
4Fe  +  3O₂ →   2Fe₂O₃ 

• Synthesis
• Decomposition
• Single Replacement 
• Double Replacement

What kind of reaction is this:
2H₂O₂ →2 H₂O + O₂

• Synthesis
• Decomposition
• Single Replacement 
• Combustion

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What kind of reaction is this:
Fe + CuSO₄ -> Cu + FeSO₄

• Double Replacement
• Decompostion
• Single Replacement
• Combustion

What is the product when rubidium and oxygen gas react?

• RbO₂
• Rb₂O
• RbO
• Rb₂O₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-1