Law of Conservation of Mass

Law of Conservation of Mass

Balancing Equations and Types of Equations

Multiple Choice

What is the part of the chemical equation in green called? 
Fe + S --> FeS

• products
• reactants
• yield
• chemical formula

Multiple Choice

A chemical reaction is balanced when

• both sides have the same elements
• Both sides have the same  number of atoms
• Same subscripts
• Same coefficients

Multiple Choice

The number in front of a compound or element is a 

• Subscript
• Coefficient
• Superscript
• Charge

Multiple Choice

The number to the lower side of an element is a 

• Subscript
• Superscript
• Coefficient
• Charge

Multiple Choice

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit
• Invisible
• Transformed, changed
• None of the above

Multiple Choice

Is this balanced?
Al + O₂ → 2Al₂O₃

• Yes
• No

Multiple Choice

How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl₂ + H₂

• 1
• 2
• 3
• 4

Multiple Choice

Element or compound?
H₂O

• element
• compound

Multiple Choice

How many elements are in C₆H₁₂O₆?

• 1
• 2
• 3
• 4

Multiple Choice

What coefficient should be used to make the following equation balanced?

N₂+O₂--> _NO

• 1

• 2

• 3

• 4

Multiple Choice

What coefficient should be used to make the following equation balanced?
N₂+O₂--> _NO 

• 1
• 2
• 3
• 4

Multiple Choice

What reaction has the following general formula:

A + B --> AB

• Combination (synthesis)

• Decomposition

• Single Replacement

• Double Replacement

Multiple Choice

What reaction has the following general formula:

A + CD --> C + AD

• Combination (synthesis)

• Decomposition

• Single Replacement

• Double Replacement

Multiple Choice

What reaction has the following general formula:

AB --> A + B

• Combination (synthesis)

• Decomposition

• Single Replacement

• Double Replacement

Multiple Choice

Identify the following chemical reaction.

Pb + FeSO₄ ----> PbSO₄ + Fe

• Synthesis (or combination)

• Decomposition

• Singlereplacement

• Double replacement

Multiple Choice

Identify the following chemical reaction.

3 HBr + 1 Al(OH)₃ ----> 3 H­₂O + 1 AlBr₃

• Synthesis (or combination)

• Decomposition

• Single displacement

• Double displacement

Multiple Choice

Which type of chemical reaction has two or more reactants to make one product?

• decomposition

• single replacement

• doublereplacement

• synthesis

Multiple Choice

Which type of chemical reaction has two or more reactants to make one product?

• decomposition

• single replacement

• double replacement

• synthesis