Chem Reaction Review

Chem Reaction Review

Anatomy of a Chemical Reaction

Multiple Choice

What coefficients will balance this equation?

_CF₄ + _Br₂ → _CBr₄ + _F₂

• 2,1,2,1

• 1,2,2,1

• 1,2,1,2

• 2,2,2,2

Multiple Choice

Which of the following equations is balanced?

• 2CH₄ + O₂ → CO₂ + H₂O

• CH₄ + 2O₂ → CO₂ + H₂O

• CH₄ + 2O₂ → CO₂ + 2H₂O

• None of the chemical equations are balanced.

Multiple Choice

How many atoms of nitrogen are in (NH₄)₂S?

• 4

• 2

• 1

• 8

Multiple Choice

What does the Law of Conservation of Mass state?

• Matter cannot be gained or lost in a chemical reaction.
• Matter can only be lost in a chemical reaction.
• Matter can only be gained in a chemical reaction.
• Matter can be gained and lost in a chemical reaction. 

Multiple Choice

Identifies the number of moles of reactants and products in a balanced chemical equation.

• coefficient

• subscript

• superscript

• SI unit

Multiple Choice

Which is the name of the kind of solid substance formed when two solutions react?

• aqueous

• precipitate

• participle

• synthesis

Multiple Choice

the starting materials in a chemical reaction

• Products
• Reactants
• Starters
• Enders

Multiple Choice

Which type of reaction is:

2 H₃AsO₄ → As₂O₅ + 3 H₂O

• Synthesis

• Decomposition

• Single Displacement

• Combustion

Multiple Choice

Which type of reaction is:

2 NH₃ + H₂SO₄ → (NH₄)₂SO₄

• Synthesis

• Decomposition

• Single Displacement

• Double Displacement

Multiple Choice

The number of atoms you begin with in a chemical reaction ___.

• must be the same as the number of atoms you end with

• must be an even number

• can be different to the number you finish with

• changes depending on how much energy is formed

Multiple Choice

Which type of reaction is:

3 Pb + 2 H₃PO₄ → 3 H₂ + Pb₃(PO₄)₂

• Synthesis

• Single Displacement

• Double Displacement

• Combustion

Multiple Choice

Which type of reaction is:

4 (NH₄)₃PO₄ + 3 Pb(NO₃)₄ → 12 NH₄NO₃ + Pb₃(PO₄)₄

• Synthesis

• Decomposition

• Single Displacement

• Double Displacement

Mole to Mole Stoichiometry

Multiple Choice

Fe₂O₃(s) + 3H₂(g) → 2Fe(s) + 3H₂O(l)

How many moles of iron can be made from 6 moles H₂?

• 4 moles Fe

• 6 moles Fe

• 9 moles Fe

• 2 moles Fe

Multiple Choice

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

What is the total number of moles of water needed to make 2.5 moles of C₆H₁₂O₆?

• 2.5

• 6

• 12

• 15

Multiple Choice

4NH₃ + 5O₂ → 4NO + 6H₂O

What is the total number of moles of H₂O produced when 12 mole of NH₃ is completely consumed?

• 15

• 18

• 20

• 24