Balancing Chemical Equations PS

What are the smaller numbers that you CANNOT change in a chemical equation? 

• Coefficient
• Products
• Reactants
• Subscript

What are the larger numbers that you CAN CHANGE in a chemical equation? 

• Coefficient 
• Products
• Reactants
• Subscripts

What law governs the balancing of chemical equations? 

• Law of Energy
• Law of Conservation of Matter/Mass
• Law of Gravity
• Law of Matter Movement 

What is the Law of Conservation of Mass?

• It states that no matter can be created or destroyed.
• It states that no energy can be created or destroyed.
• It states that matter can be created or destroyed.
• It states that no sound can be created or destroyed.

What is a coefficient?

• The small number on the right of the chemical symbol.
• The large number in front of a chemical formula.
• The number in between the chemical symbols.
• The number behind a chemical formula.

How many elements are in C₆H₁₂O₆?

• 1
• 2
• 3
• 4

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

• 1
• 2
• 3
• 4

Is this balanced?
Al + O₂ → 2Al₂O₃

• Yes
• No

The substances listed on the left side of a chemical equation are the

• Products
• Coefficients
• Precipitates
• Reactants

In balancing chemical equations, we change

• Coefficients
• Subscripts
• Both can be changed
• None can be changed