Understanding Average Atomic Mass of Carbon

What is the relative abundance of Carbon-12?

• 13.34%

• 12.00%

• 1.07%

• 98.93%

How do you convert a percentage into decimal form?

• Multiply by 100

• Divide by 10

• Divide by 100

• Add 1

Which of the following is the atomic mass unit of Carbon-13?

• 13.34

• 14.00

• 11.00

• 12.00

What is the first step in calculating the average atomic mass?

• Subtract the smallest mass from the largest

• Divide the total mass by the number of isotopes

• Multiply the mass of each isotope by its relative abundance

• Add the masses of all isotopes

What is the final average atomic mass of carbon rounded to two decimal places?

• 12.00

• 13.00

• 12.01

• 11.99