Sodium Atomic Mass and Molar Concepts

The video tutorial explains how to calculate the mass of a sodium atom by using its molar mass and Avogadro's number. It covers the concept of molar mass, the conversion factor, and the calculation process, including converting the result to kilograms. Additionally, it discusses how to calculate the mass of a sodium isotope by replacing the atomic mass with the isotope's mass number.

What is the primary method used to calculate the mass of a sodium atom?

• Multiplying the molar mass by Avogadro's number

• Dividing the molar mass by Avogadro's number

• Using the atomic number of sodium

• Using the density of sodium

What is the unit of molar mass for sodium?

• Kilograms per mole

• Moles per gram

• Grams per mole

• Atoms per mole

What is the average atomic mass of sodium in grams per mole?

• 11.00

• 24.00

• 22.99

• 23.00

How do you convert the molar mass of sodium to the mass of a single atom?

• Add Avogadro's number

• Multiply by Avogadro's number

• Divide by Avogadro's number

• Subtract Avogadro's number

What is Avogadro's number used for in this context?

• To convert moles to atoms

• To find the atomic number

• To determine the volume

• To calculate the density

Why is the mass of a single atom considered a small number?

• Atoms have a high atomic number

• Atoms are very dense

• Atoms are made of heavy particles

• Atoms are very small and light

How can the mass of a sodium atom be expressed in kilograms?

• Subtract 1000 from the mass in grams

• Multiply the mass in grams by 1000

• Divide the mass in grams by 1000

• Add 1000 to the mass in grams

What is the mass number of the isotope sodium-22?

• 22

• 23

• 24

• 11

How would you calculate the mass of an atom of sodium-22?

• Use the atomic number of sodium

• Divide the average atomic mass by 22

• Multiply the average atomic mass by 22

• Replace the average atomic mass with 22