The Mole Concept.

Question 1

What is the Avogadro number or the Avogadro constant?

Answer 1

The number of atoms, ions or molecules is called the Avogadro number or the Avogadro constant.

Question 2

What is a mole?

Answer 2

A mole is the amount of substance that contains 6 x 10²³ atoms, ions, or molecules.

Question 3

What are the three ways you can calculate the number of moles?

Answer 3

Number of moles = mass of substance ÷ mass of one
mole/Mr.

Number of moles = Volume of gas in dm³ at r.t.p ÷ 24.

Number of moles = concentration of solution (mol/dm³) x
volume of solution (dm³).

Question 4

How do you convert the value from cm³ to dm³?

Answer 4

If the value is in cm³ divide by 1000 to get a value in dm³.