Balancing Chemical Reactions Quiz

Complete the sentence.

During a chemical reaction, atoms ________.

• can appear

• can disappear

• get rearranged

• stop moving and vibrating

Identify the product(s) in the following chemical reaction:

Chromium oxide + Carbon → Chromium + Carbon monoxide

• Chromium and carbon.

• Chromium and carbon monoxide.

• Chromium and carbon dioxide.

• Chromium oxide and carbon.

How many iron (Ag) atoms are reactants in this equation?

4Ag + 3O2 → 2Ag2O

• 4

• 2

• 3

• 0

In chemical reactions, a product is _________.

• any substance that is made of the greatest number of atoms

• any substance that is made from the least number of atoms

• any substance that is to the left of the arrow

• any substance to the right of the arrow

What is the role of the arrow sign in a chemical reaction?

• Making sure atom counts on each side are the same.

• Separating products and reactants.

• Showing which substances were in the container first and which substances were added later.

• Showing which substances are solids and which are liquids or gases.

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. 

How many Mn atoms are found in the reactants of the following equation as indicated by the coefficients?

3 Cr(MnO₄)₆ + 6 Na₃N ----> ______________

• 3

• 4

• 6

• 18

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

• Coefficient 
• Subscript
• Atom
• Equation

Is the following equation balanced?...
Al + O₂ --> 2Al₂O₃

• Yes!
• No!

What is the number before a chemical formula called?
Ex: 2H₂ + O₂ --> 2H₂O

• Coefficient
• Subscript
• Atom
• Equation