Counting atoms

How many Elements are in the compound C₂H₈O ?

• 2
• 1
• 3
• 0

The number of Na's in Na₂CO₃

• 1
• 2
• 3
• 6

How many Oxygen atoms are in H₂O?

• 1

• 2

• 0

• 4

How many Magnesium atoms are in 10MgCl₂?

• 10

• 5

• 20

How many atoms of Hydrogen are in this compound?

• 1

• 2

• 3

• 4

How many Aluminum are in Al₂O₃?

• 3
• 2
• 5

How many Chlorine are in MgCl₂?

• 2
• 1
• 3

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

HCl has how many atoms of each element?

• H=1, Cl=1

• H=2, Cl=2

• H=3, Cl=1

N₂ has how many total atoms?

• 1

• 2

• 3