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Avogadro's Number
  • 1. How many atoms are in 4.6moles of Gold?
A) 2.7692x1023
B) 4.816x1023
C) 6.02x1023
D) 1.204x1024
  • 2. How many water molecules in 0.8moles?
A) 6.02x1023
B) 1.204x1024
C) 4.816x1023
D) 2.7692x1023
  • 3. How many moles are 1.806x1024 atoms of helium?
A) 3
B) 2
C) 1
D) 4
  • 4. How many moles are 3.01x1023 molecules of carbon dioxide?
A) 0.3
B) 0.8
C) 1
D) 0.5
  • 5. How many atoms are in 5g of sodium?

    (Hint: first find how many moles 5g of Sodium is)
A) 3.01x1024
B) 3.01x1023
C) 1.31x1023
D) 6.02x1023
  • 6. How many molecules of carbon monoxide are in 100g?

    (Hint: first find how many moles of carbon dioxide 100g is)
A) 6.02x1023
B) 1.37x1024
C) 2.15x1024
D) 6.02x1022
  • 7. How many zinc atoms in 20g of Zinc Chloride?
A) 8.85x1022
B) 1.20x1023
C) 1.77x1023
D) 6.02x1023
  • 8. How many chlorine atoms in 20g of Zinc Chloride?
A) 8.85x1022
B) 1.77x1023
C) 1.20x1023
D) 6.02x1023
  • 9. How many oxygen atoms in 100g of copper sulphate?
A) 1.20x1023
B) 6.02x1023
C) 1.51x1024
D) 1.37x1024
  • 10. How many oxgyen atoms in 50g of dinitrogen tetraoxide?
A) 1.20x1024
B) 6.02x1023
C) 1.31x1024
D) 3.27x1023
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