Question

In the form of a diagram/flowsheet, show how the concept of mole connects to other concepts that we studied in class, such mass volume, pressure, number of atoms/molecules, etc. Show the mathematical relation used to go from a number of moles to each one of those properties and vice versa. The project can be hand-written (drawn) if your handwriting is neat and easily legible. It can also be drawn using programs such as Microsoft Word.

Answer 1

Moles is a unit used in chemistry. It is defined as amount of substance that contain elementary consituents (like atoms molecules , ions , electrons ) as there are atoms in 12 grams of Pure ¹²C carbon atom.

1 mole of atoms = 6.023*10²³ atoms .

1 mole molecule = 6.023*10²³ molecules.

1 mole electron = 6.023*10²³ electrons.

Volume of 1 mole substance at STP = 22.4 L

1 mole 1 gram molecular mass

As for example

4 g He 1 mole He 22.4 L at STP

And, 1 mole He = 6.023*10²³ atoms = 6.023*10²³ molecules ( as Helium is monoatomic)

Again from. Ideal gas equation

PV= nRT

Or, n = PV/ RT

Where, n is number of moles, P is pressure, V is volume , R is universal gas constant , T is temperature.

Relationship between mass of a substance and mole.

Mole = Mass / Molar mass

Like, 16 g oxygen 16/ molar mass of oxygen = 16/32 = 0.5 mole (6.023*10²³/2) number of molecules

= 6.023*10²³ number of oxygen atoms .

As, Oxygen is diatomic , Number of atoms in 1 mole oxygen is twice than that of oxygen molecules.