Understanding Fe2O3 and Avogadro's Number

The video tutorial explains how to determine the number of atoms in iron(III) oxide (Fe2O3). It begins by identifying the elements in Fe2O3, which are iron and oxygen, and explains the significance of subscripts in chemical formulas. The tutorial then calculates the total number of atoms in Fe2O3 by adding the subscripts. Additionally, it covers how to find the number of oxygen atoms in one mole of Fe2O3 using Avogadro's number. The video concludes with a brief summary.

What does the subscript '2' in Fe2O3 indicate?

• There are two atoms of iron in the compound.

• There are two atoms of oxygen in the compound.

• There are two moles of Fe2O3.

• There are two molecules of Fe2O3.

How many total atoms are present in a single molecule of Fe2O3?

• Six

• Three

• Five

• Four

Which element in Fe2O3 has more atoms per molecule?

• Both have the same number

• Neither, it's a trick question

• Oxygen

• Iron

If you have one mole of Fe2O3, how many oxygen atoms does it contain?

• Three times Avogadro's number

• Avogadro's number

• Four times Avogadro's number

• Two times Avogadro's number

What is the role of Avogadro's number in calculating atoms in a mole?

• It is used to determine the molecular weight.

• It is used to convert grams to moles.

• It is used to find the number of molecules in a mole.

• It is used to find the number of atoms in a mole.