Balancing Chemical Equations

Multiple Choice

The blue numbers in the image below represent ________

• I don't know, and don't want to try
• coefficients
• subscripts
• none of the answers are correct

Multiple Choice

How many atoms of Sulfur are in Al2S3?

• 1

• 2

• 3

• 4

Multiple Choice

How many atoms of Calcium, Phosphorus, and Oxygen are present in the compound Ca3(PO4)2?

• 3 Calcium, 2 Phosphorus, 8 Oxygen

• 3 Calcium, 1 Phosphorus, 4 Oxygen

• 3 Calcium, 2 Phosphorus, 6 Oxygen

• 3 Calcium, 2 Phosphorus, 4 Oxygen

Multiple Choice

In a RAP table, what information do we need to include about the atoms present in a reaction?

• The type of atoms

• The number of atoms

• Whether they are reactants or products

• All of the above

4Fe + 3O₂ --> 2Fe₂O₃

Multiple Choice

What are the coefficients when the equation is balanced?

• 2 + 3 --> 2 + 3 + 4
• 1 + 3 --> 1 + 3 + 2
• 2 + 4 --> 2 + 3 + 2
• 1 + 1 --> 1 + 1 + 1

2Na + Cl₂ --> 2NaCl

Open Ended

How does the process of balancing equations illustrate the Law of Conservation of Mass?

2Li + 2HNO₃ --> 2LiNO₃ + H₂

Multiple Choice

Balance the equation with polyatomic ions: $$\text{BaCl}_2 + \text{Na}_2\text{SO}_4 \rightarrow \text{BaSO}_4 + \text{NaCl}$$

• $$\text{BaCl}_2 + \text{Na}_2\text{SO}_4 \rightarrow \text{BaSO}_4 + 2\text{NaCl}$$

• $$2\text{BaCl}_2 + \text{Na}_2\text{SO}_4 \rightarrow 2\text{BaSO}_4 + 2\text{NaCl}$$

• $$\text{BaCl}_2 + 2\text{Na}_2\text{SO}_4 \rightarrow \text{BaSO}_4 + 4\text{NaCl}$$

• $$\text{BaCl}_2 + \text{Na}_2\text{SO}_4 \rightarrow 2\text{BaSO}_4 + \text{NaCl}$$

CH₄ + 2O₂ --> CO₂ + 2 H₂O

2 Na + I₂ --> 2NaI

2KClO₃ --> 2KCl + 3O₂

Reorder

Balance the following equation:

_C₅H₁₂ + _O₂ → _CO₂ + _H₂O

• 1

• 8

• 5

• 6

1

2

3

4

• 1
• 2
• 3
• 4

Draw

Balance the following chemical equations. Be sure to show your work.

Poll

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