Two Step Mole Conversions Challenge

What is the central unit in mole conversions?

• Moles

• Liters

• Grams

• Particles

How do you determine if a problem is a one-step mole conversion?

• If you start or end with particles

• If you start or end with liters

• If you start or end with moles

• If you start or end with grams

What conversion factor is used to go from mass to moles?

• Avogadro's number

• Molar mass

• Density

• Volume of gas

In the example problem, what is the molar mass of lithium used?

• 18.2

• 6.02

• 22.4

• 6.941

What is the final answer for the number of atoms in 18.2 grams of lithium?

• 1.58 x 10^24 atoms

• 1.57 x 10^24 atoms

• 1.59 x 10^24 atoms

• 1.60 x 10^24 atoms

What is the conversion factor for particles to moles?

• 22.4

• 6.02 x 10^23

• 6.941

• 1.00

In the second example, what is the conversion factor for moles to liters?

• 22.4

• 6.02 x 10^23

• 1.00

• 6.941

What should you do if you get a very large or very small answer in scientific notation?

• Recheck your conversion factors

• Ignore it

• Use a different method

• Check for calculator errors

How many significant figures should the final answer have in the second example?

• 4

• 3

• 2

• 5

What is the final unit for the second example problem?

• Moles

• Particles

• Grams

• Liters