Balancing Chemical Equations Lesson

Balancing Chemical Equations lesson

Poll

How are you feeling about balancing equations so far?

• Still confused

• Understand a little

• Getting better after yesterday's video

• Feel confident

Multiple Choice

What is the law of conservation of mass?

• Mass is can be created or destroyed.

• Mass is neither created nor destroyed.

• Volume is neither created nor destroyed.

• Volume is can be created or destroyed.

Fill in the Blanks

Fill in the Blanks

Multiple Choice

Is the following reaction balanced?
2CH₃OH + 3O₂ --> 2CO₂ + 4H₂O

• yes
• no

Multiple Choice

Is the following reaction balanced?
NaHCO₃ --> Na₂CO₃ + H₂O + CO₂

• yes
• no

Multiple Choice

What is the total number of atoms present in 5Na₃PO₄

• 5
• 40
• 55
• 8

Multiple Choice

What is the right part of a chemical equation called...
2H_{2 +} O₂ --> 2H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

Multiple Choice

What is the little number after an element in a chemical equation called.
Example: H₂

• Coefficient 
• Subscript
• Atom
• Equation

Multiple Choice

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

• products
• reactants
• yield
• chemical formula

Multiple Choice

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.