Reactions & Moles

To balance equations, change the _____________ to make the number of atoms on each side of the equation balance.

• Formulas of the Compounds in the Reactants

• Coefficient of Compounds

• Formulas of Compounds in the Products

• Subscripts of the Compounds

What is the coefficient for O₂ when the following equation is balanced: C₈H₁₈ + O₂ --> CO₂ + H₂O

• 8

• 17

• 18

• 25

C + O₂ --> CO. What is the total sum of the coefficients when the equation is balanced?

• 3

• 5

• 6

• 8

Identify the following chemical equation.

• Single Replacement

• Double Replacement

• Combustion

• Synthesis

Identify the type of reaction in the following:

• Synthesis

• Double Replacement

• Decomposition

• Single Replacement

Which types of chemical reactions are represented by these equations?

• Single Replacement and Synthesis

• Decomposition and Double Replacement

• Single Replacement and Decomposition

• Single Replacement and Combustion

What reaction type is characterized by the reactant breaking down as the reaction progresses?

• Synthesis
• Decomposition
• Combustion
• Double Replacement

What is the term for the → sign in a reaction?

• makes
• produces
• yields
• all are correct

What two molecules are produced in a combustion reaction?

• CO₂ + NH₄
• SiO₂ + H₂O
• H₂O + CO₂
• CO₂ + H₂O₂

Tags

NGSS.MS-PS1-5

Which set of coefficients properly balances the reaction below?
_Cu + _H₂O →_ CuO₃ + _H₂

• 1,3,1,5
• 2,6,2,6
• 1,3,1,3
• 1,2,3,4

Tags

NGSS.HS-PS1-7