Converting Moles and Atoms

This video tutorial explains how to convert between moles and atoms using Avogadro's number. It covers the process of multiplying by Avogadro's number to convert moles to atoms and dividing by it to convert atoms to moles. The tutorial includes examples with helium, iron, silver, and gold, and discusses handling different exponents in scientific notation. The video emphasizes the importance of using conversion factors and dimensional analysis for accurate calculations.

What is the key number used to convert moles to atoms?

• Euler's number

• Boltzmann's constant

• Planck's constant

• Avogadro's number

When converting moles to atoms, what operation is performed with Avogadro's number?

• Division

• Multiplication

• Subtraction

• Addition

If you have 1.21 moles of helium, how many atoms do you have?

• 1.21 x 10^23 atoms

• 7.28 x 10^23 atoms

• 8.21 x 10^23 atoms

• 6.02 x 10^23 atoms

What is the result of converting 0.78 moles of iron to atoms?

• 4.7 x 10^23 atoms

• 3.5 x 10^23 atoms

• 5.6 x 10^23 atoms

• 2.8 x 10^23 atoms

What operation is used to convert atoms to moles?

• Addition

• Subtraction

• Multiplication

• Division

How many moles are in 8.21 x 10^23 atoms of silver?

• 3.36 moles

• 0.36 moles

• 2.36 moles

• 1.36 moles

What is the result of converting 2.77 x 10^23 atoms of gold to moles?

• 1.46 moles

• 3.46 moles

• 0.46 moles

• 2.46 moles

When converting atoms to moles, what happens to the exponents if they are the same?

• They are added

• They are multiplied

• They cancel out

• They are divided

If you have 10^13 atoms instead of 10^23, what is the exponent after conversion?

• -10

• 10

• -23

• 0

What is the final result when converting 10^13 atoms using Avogadro's number?

• 0.46 x 10^-23

• 0.46 x 10^23

• 0.46 x 10^10

• 0.46 x 10^-10