Calculating Mass of Helium Atoms

The video tutorial explains how to calculate the mass of one atom of helium. It involves two main steps: calculating the molar mass of helium and dividing it by Avogadro's number. The molar mass of helium is 4.00 grams per mole, and Avogadro's number is the number of particles in one mole. By dividing the molar mass by Avogadro's number, we find the mass of a single helium atom, which is a very small number, as expected. The video concludes with a recap of the steps and the final result.

What are the two main steps to calculate the mass of a helium atom?

• Calculate the molar mass and multiply by Avogadro's number

• Find the atomic number and divide by Avogadro's number

• Calculate the molar mass and divide by Avogadro's number

• Find the atomic number and multiply by Avogadro's number

What is the molar mass of helium?

• 6.00 grams per mole

• 4.00 grams per mole

• 8.00 grams per mole

• 2.00 grams per mole

Why is Avogadro's number important in this calculation?

• It is the atomic number of helium

• It is the number of particles in one mole

• It is used to convert grams to moles

• It represents the number of atoms in a single molecule

How do you calculate the mass of one helium atom?

• Subtract Avogadro's number from the molar mass

• Add the molar mass to Avogadro's number

• Divide the molar mass by Avogadro's number

• Multiply the molar mass by Avogadro's number

What is the result of dividing the molar mass of helium by Avogadro's number?

• 6.02 x 10^-23 grams

• 6.02 x 10^23 grams

• 0.66 x 10^-23 grams

• 0.66 x 10^23 grams

Why does the calculated mass of a helium atom make sense?

• Because atoms are large and the number is large

• Because helium is a solid and the number is small

• Because atoms are small and the number is small

• Because helium is a gas and the number is large

What is the significance of the number 4.00 in this calculation?

• It is the molar mass of helium

• It is the atomic number of helium

• It is the number of helium atoms in a mole

• It is the number of moles in a gram of helium

What is the final unit of the mass of one helium atom?

• Grams per mole

• Moles per gram

• Grams

• Moles

What is the purpose of the video tutorial?

• To determine the volume of helium gas

• To explain the chemical properties of helium

• To calculate the mass of one atom of helium

• To find the atomic number of helium