1. Clicker #1
Which of the following shows the correctly balanced equation for this reaction:
H2O2 → H2O + O2
A) 3 H2O2 → 3 H2O + O2
B) H2O2 → 2 H2O + O2
C) 2 H2O2 → 2 H2O + O2
D) H2O2 → H2O + O2

2. Clicker #2
Which of the following diagrams best represents the chemical equation N2 + H2 → NH3 after it is balanced?
A) →
B) → +
C) →
D) → +
E) →

3. Clicker #3 (practice)
Which of the following shows the correctly balanced equation for this reaction:
CaC2 + H2O → C2H2 + Ca(OH)2
A) CaC2 + H2O → C2H2 + Ca(OH)2
B) CaC2 + 2 H2O → C2H2 + Ca(OH)2
C) 2 CaC2 + H2O → C2H2 + 2 Ca(OH)2
D) 3 CaC2 + 3 H2O → C2H2 + 3 Ca(OH)2

4. Clicker #4 (practice)
What is the correct unbalanced chemical equation for the reaction of iron(II) oxide with oxygen gas to produce iron(III) oxide?
A) FeO + O2 → Fe2O3
B) FeO2 + O2 → Fe2O3
C) FeO2 + O2 → Fe3O2
D) FeO + O2 → Fe3O2
E) FeO2 + O2 → FeO