How Many Elements?

How many different elements are represented in the compound?
C₁₃H₉N

• 2
• 3
• 1
• 4

How many different elements are represented in the compound?
(ZnOH)₂SiO

• 2
• 3
• 1
• 4

How many different elements are represented in the compound?
H₂O₂

• 2
• 3
• 1
• 4

How many different elements are represented in the compound?
Fe₃O₄

• 2
• 3
• 1
• 4

How many different elements are represented in the compound?
Pb(NO₃)₂

• 2
• 3
• 1
• 4

How many different elements are represented in the compound?
Mg₃(PO₄)₂

• 1
• 2
• 3
• 4

How many different elements are represented in the compound?
MnO₂

• 1
• 2
• 3
• 4

How many different elements are represented in the compound?
O₂

• 1
• 2
• 3
• 4

How many different elements are represented in the compound?
CH₄

• 1
• 2
• 3
• 4

How many different elements are represented in the compound?
C₆H₅CH₃

• 1
• 2
• 3
• 4