5/01 Learning Check: Balancing Equations

How many oxygen atoms are present below?

Fe₂CO₃

• 1

• 2

• 3

• 6

How many oxygen atoms are present below?

Mg₃(PO₄)₂

• 2

• 4

• 6

• 8

How many oxygen atoms are present below?

3 Mg₃(PO₄)₂

• 4

• 8

• 18

• 24

Below is an unbalanced equation. What is the balanced equation?

__ C₂H₄ + __ O₂ --> __ CO₂ + __ H₂O

• __ C₂H₄ + 1 O₂ --> 2 CO₂ + 2 H₂O

• __ C₂H₄ + 3 O₂ --> 2 CO₂ + 2 H₂O

• 2 C₂H₄ + 2 O₂ --> 3 CO₂ + 2 H₂O

• 2 C₂H₄ + 3 O₂ --> 2 CO₂ + 2 H₂O

Below is an unbalanced equation. What is the balanced equation?

_ Fe₂(SO₄)₃ + _ KOH -> _ K₂SO₄ + _ Fe(OH)₃

• _ Fe₂(SO₄)₃ + 3 KOH -> _ K₂SO₄ + 2 Fe(OH)₃

• _ Fe₂(SO₄)₃ + 6 KOH -> 3 K₂SO₄ + 2 Fe(OH)₃

• _ Fe₂(SO₄)₃ + 2 KOH -> _ K₂SO₄ + 2 Fe(OH)₃

• _ Fe₂(SO₄)₃ + 6 KOH -> 3 K₂SO₄ + _ Fe(OH)₃