Mass of Carbon Atoms and Isotopes

The video tutorial explains how to calculate the mass of one atom of carbon using the atomic mass from the periodic table and Avogadro's number. It covers the conversion of atomic mass from grams to kilograms and discusses how to calculate the mass of carbon isotopes, such as carbon-14. The tutorial provides a step-by-step guide to ensure accurate calculations, emphasizing the importance of conversion factors and unit cancellation.

What is the first step in finding the mass of one atom of carbon?

• Calculate the number of protons in carbon.

• Find the atomic number of carbon.

• Locate carbon on the periodic table.

• Determine the molar mass of carbon.

How is the atomic mass of carbon represented?

• In moles per gram.

• In atoms per mole.

• In grams per atom.

• In grams per mole.

What is the purpose of using a conversion factor in the calculation?

• To determine the atomic number.

• To cancel out moles and leave grams.

• To convert grams to moles.

• To find the number of atoms in a mole.

What is the mass of one atom of carbon in grams?

• 2.0 x 10^-26 grams

• 2.0 x 10^23 kilograms

• 2.0 x 10^-23 grams

• 2.0 x 10^23 grams

How do you convert the mass of one carbon atom from grams to kilograms?

• Multiply by 1000.

• Divide by 1000.

• Add 1000.

• Subtract 1000.

What is the mass of one atom of carbon in kilograms?

• 2.00 x 10^-23 kg

• 2.00 x 10^-26 kg

• 2.00 x 10^26 kg

• 2.00 x 10^23 kg

How would you calculate the mass of a carbon-14 atom?

• Use the atomic mass of 12.01 and multiply by Avogadro's number.

• Use the atomic mass of 14 and multiply by Avogadro's number.

• Use the atomic mass of 12.01 and divide by Avogadro's number.

• Use the atomic mass of 14 and divide by Avogadro's number.

What changes in the calculation when considering an isotope like carbon-14?

• The atomic mass changes to 14.

• The conversion factor is not needed.

• The atomic number is used instead of atomic mass.

• Avogadro's number is different.

What is Avogadro's number used for in these calculations?

• To find the number of atoms in a gram.

• To convert moles to grams.

• To determine the number of particles in a mole.

• To calculate the atomic number.