Balancing and Classifying Chemical Equations

What class of reaction best describes the equation below: CH₄ + O₂ --> CO₂ + H₂O

• single replacement

• double replacement

• decomposition

• combustion

Tags

NGSS.MS-PS1-2

What class of reaction best describes the equation below: FeS + HCl --> H₂S + FeCl₂

• synthesis

• combustion

• single replacement

• double replacement

Tags

NGSS.MS-PS1-2

Which of the following is an example of a single replacement reaction?

• 2NaF --> 2 Na + F₂

• P₂O₅ + 3 H₂O --> 2H₃PO₄

• 2FeCl₃ + 3Zn --> 2Fe + 3ZnCl₂

• C₆H₁₂O₆ + 6O₂ --> 6CO₂ + 6 H₂O

Tags

NGSS.MS-PS1-2

What is the little number after an element in a chemical equation called.
Example: H₂

• Coefficient 

• Subscript

• Atom

• Equation

Mg + N₂ --> Mg₃N₂

• Synthesis (combination)

• Decomposition

• Single replacement

• Combustion

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Mg + HCl --> MgCl₂ + H₂

• combustion

• synthesis

• decomposition

• single replacement

What does a balanced equation represent in chemistry?

• An equation where the number of atoms for each element is equal on both sides.

• An equation where the number of molecules is equal on both sides.

• An equation where the number of ions is equal on both sides.

• An equation where the number of electrons is equal on both sides.

Tags

DOK Level 1: Recall

What is the coefficient in a chemical equation?

• A number that indicates the number of atoms in a molecule.

• A number that indicates the number of molecules or moles of a substance.

• A number that indicates the charge of an ion.

• A number that indicates the temperature of the reaction.

Tags

DOK Level 1: Recall

What goes on the right side of a chemical equation and what goes on the left?

• Reactants on the right, products on the left.

• Products on the right, reactants on the left.

• Reactants on both sides.

• Products on both sides.

Tags

DOK Level 1: Recall

What does the Law of Conservation of Mass state?

• Mass can be created and destroyed in a chemical reaction.

• Mass is neither created nor destroyed in a chemical reaction.

• Mass is always increased in a chemical reaction.

• Mass is always decreased in a chemical reaction.

Tags

DOK Level 1: Recall