Factor Label Method and Molar Mass

The video tutorial explains how to convert moles of O2 to grams using the molar mass. It begins by introducing the problem and using the periodic table to find the molar mass of O2. The tutorial then demonstrates the conversion process by multiplying the number of moles by the molar mass to obtain grams. An alternative method, dimensional analysis, is also presented, showing how to set up the conversion using a factor-label approach. The video concludes with a summary of the methods discussed.

What is the first step in converting moles of O2 to grams?

• Use the atomic mass of hydrogen.

• Find the atomic number of oxygen.

• Use a map to guide the conversion process.

• Directly multiply moles by grams.

How do you determine the molar mass of O2?

• Use the atomic mass of nitrogen.

• Divide the atomic mass of oxygen by two.

• Multiply the atomic mass of oxygen by three.

• Add the atomic masses of two oxygen atoms.

What is the molar mass of O2 used in the conversion?

• 32.00 grams per mole

• 28.00 grams per mole

• 18.00 grams per mole

• 16.00 grams per mole

What is the result of converting 0.73 moles of O2 to grams?

• 23.36 grams

• 28.00 grams

• 32.00 grams

• 16.00 grams

What is another method for converting moles to grams that teachers prefer?

• Graphical analysis

• Molecular division

• Factor label or dimensional analysis

• Atomic subtraction

In the factor label method, what do you replace the multiplication symbol with?

• A division symbol

• A subtraction symbol

• Another line

• A plus symbol

What is the purpose of the factor label method?

• To simplify the conversion process

• To make the conversion more complex

• To change the units of measurement

• To avoid using the periodic table

What is the desired quantity in the conversion process?

• Moles

• Grams

• Atoms

• Liters

What is the given quantity in the conversion process?

• Grams

• Liters

• Moles

• Atoms

What is the key concept of the factor label method?

• Given minus desired

• Given over desired

• Desired plus given

• Desired over given