What Is Avogadro's Number - The Mole

The video tutorial introduces Amedeo Avogadro, an Italian scientist known for Avogadro's number, which is the number of particles in a mole. It explains how the mass of Avogadro's number of atoms or molecules relates to their relative atomic or molecular mass in grams. The tutorial also covers Avogadro's hypothesis, which states that equal volumes of gases at the same temperature and pressure contain the same number of molecules. This concept simplifies gas calculations, as demonstrated in an example where the volume of oxygen gas is calculated using molar volume.

What is Avogadro's number used to represent?

• The number of atoms in a single molecule

• The number of particles in a mole

• The mass of a single atom

• The volume of a gas at standard temperature

If you have Avogadro's number of chlorine molecules, what is their mass?

• 24 grams

• 71 grams

• 35.5 grams

• 1 gram

According to Avogadro's hypothesis, what do equal volumes of gases at the same temperature and pressure contain?

• Different numbers of molecules

• The same mass

• The same number of molecules

• Different volumes

What is the molar volume of a gas at room temperature and pressure?

• 22.4 decimeters cubed per mole

• 18 decimeters cubed per mole

• 24 decimeters cubed per mole

• 32 decimeters cubed per mole

How much volume does 4 grams of oxygen gas occupy at room temperature?

• 3 decimeters cubed

• 4 decimeters cubed

• 2 decimeters cubed

• 5 decimeters cubed