Molar Mass Calculations and Concepts

The video tutorial explains how to calculate the molar mass of iron(II) oxide (FeO). It begins by identifying the molar mass of iron and oxygen from the periodic table, which are 55.85 g/mol and 16.00 g/mol, respectively. These values are then added to obtain the total molar mass of FeO, which is 71.85 g/mol. The importance of using correct units and rounding to two decimal points is emphasized. The tutorial concludes by noting that slight variations in the final result may occur due to different rounding practices.

What is the atomic mass of iron as used in the calculation of FeO's molar mass?

• 55.85 grams per mole

• 16.00 grams per mole

• 1.00 gram per mole

• 71.85 grams per mole

How do you calculate the molar mass of a compound like FeO?

• By subtracting the atomic masses of its constituent elements

• By dividing the atomic masses of its constituent elements

• By multiplying the atomic masses of its constituent elements

• By adding the atomic masses of its constituent elements

What is the molar mass of oxygen used in the calculation for FeO?

• 1.00 gram per mole

• 71.85 grams per mole

• 16.00 grams per mole

• 55.85 grams per mole

Why is it important to write the units when calculating molar mass?

• To make the calculation look more complex

• To ensure clarity and accuracy in scientific communication

• To avoid using the periodic table

• To confuse the reader

What might cause a slight difference in the calculated molar mass of FeO?

• Using a periodic table with different rounding

• Using a different calculator

• Using a different element

• Using a different unit of measurement