Mass Calculations of Magnesium Atoms

The video tutorial explains how to calculate the mass of a single magnesium atom. It begins by introducing the concept of molar mass and Avogadro's number, which are essential for the calculation. The tutorial then walks through the steps to determine the mass of a magnesium atom by dividing the atomic mass by Avogadro's number, resulting in a very small mass value. Additionally, it covers how to convert this mass into kilograms and how to calculate the mass for different isotopes of magnesium, such as magnesium-26.

What is the first step in calculating the mass of a single magnesium atom?

• Measure the radius of the atom

• Find the volume of the atom

• Calculate the molar mass

• Determine the density of magnesium

What is the molar mass of magnesium used in the calculation?

• 26.98 grams per mole

• 24.31 grams per mole

• 32.07 grams per mole

• 12.01 grams per mole

How do you use Avogadro's number in the calculation of a magnesium atom's mass?

• Multiply it by the atomic mass

• Divide the atomic mass by Avogadro's number

• Add it to the atomic mass

• Subtract it from the atomic mass

What is the mass of one magnesium atom in grams?

• 9.11 x 10^-31 grams

• 4.04 x 10^-23 grams

• 6.02 x 10^23 grams

• 1.67 x 10^-24 grams

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

• Subtract 1000

• Add 1000

• Multiply by 1000

• Divide by 1000

What is the atomic mass used for calculating the mass of magnesium-26?

• 26

• 24.31

• 25.31

• 27

How does the calculation for a magnesium isotope differ from that of an average magnesium atom?

• Alter the conversion factor

• Use a different Avogadro's number

• Use the isotope's atomic mass

• Change the molar mass unit

What is the significance of using isotopes in mass calculations?

• They provide a more accurate mass for specific atoms

• They are not used in mass calculations

• They have the same mass as average atoms

• They simplify the calculation process