Timberlake Ch. 8.2 - Balancing Chemical Equations

Ch. 8.2 Balancing Chemical Equations

Multiple Choice

This is used to represent the amount of each atom in a molecule. What is the arrow pointing to?

• Exponent
• Coefficient
• Molecule
• Subscript

Multiple Choice

How many Iron (Fe) atoms are in this chemical formula?

• 2 iron atoms
• 6 iron atoms
• 5 iron atoms
• 4 iron atoms

Multiple Choice

How many oxygen atoms are present in the following? 
4Ca(OH)₂

• 4
• 6
• 8
• 1

Multiple Choice

What is the Law of Conservation of Mass?

• It states that matter cannot be created or destroyed.

• It states that energy cannot be created or destroyed.

• It states that matter can be created or destroyed.

• It states that sound can be created or destroyed.

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.

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 the little number after an element in a chemical equation called.

Example: H₂

• Coefficient

• Subscript

• Atom

• Equation

Multiple Choice

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

• 1
• 2
• 3
• 4

Multiple Choice

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

• Reactants
• Products 
• Yields 
• Chemical Equation 

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​Practice Balancing Chemical Equations with the simulation.

Multiple Choice

Which number should go in the blank?
_ H₂ + O₂ -> 2 H₂O

• 1
• 2
• 3
• 0

Multiple Choice

Which number should go in the blank?
2 Na+ _ Cl₂ -> 2 NaCl

• 1
• 2
• 3
• 0

Multiple Choice

Which number should go in the blank?
Mn + _ HNO₃ → Mn(NO₃)₂ + H₂

• 1
• 2
• 3
• 0

Multiple Choice

Which number should go in the blank?
Al(NO₃)₃ + _  NaOH -> Al(OH)₃ + 3 NaNO₃

• 1
• 2
• 3
• 0

Multiple Choice

__KNO₃ --> __KNO₂ + __O₂

What coefficients are needed to balance the reaction?

• 2, 2, 1

• 2, 3, 2

• 1, 2, 2

• 1, 3, 1

Multiple Choice

 Mg  +  ___ HCl  →   MgCl₂  +   H₂

• 1
• 2
• 3
• 4

Multiple Choice

Balance this equation-
__P₄ + __O₂ --> __P₂O₃

• it is already balanced
• 2, 1, 3
• 1, 2, 3
• 1, 3, 2