Paper 2

Question 1

What is Avogadro’s number

Answer 1

6.023 x 10(23). So you can think of a mole as the Avagadro number of particles in a substance, where the particles are atoms, molecules, ions or electrons

Question 2

Avogadro’s law

Answer 2

one mole of gas occupies 24dm(3)

Question 3

Molar volume

Answer 3

The space that one mole of gas takes up

Question 4

Molar volume at RTP

Answer 4

One mole of any gas always occupies 24 dm(3) at room temperature and pressure

Question 5

Formula to find molar volume

Answer 5

Volume dm (3)= moles of gas x 24
Or
Volume dm(3) = mass of gas/Mr of gas x 24

Question 6

Calculate percentage yield

Answer 6

actual yield x 100

theoretical yield

Question 7

Structure of giant ionic structure

Answer 7

The ions are held together in a closely packed 3D lattice arrangement by the attraction between oppositely charged ions

Question 8

Why do giant ionic structures have high melting and boiling points

Answer 8

Because the electrostatic attraction is very strong and a lot of energy is needed to overcome the strong attraction

Question 9

Explain the reactive reactivities of the elements in Group1

Answer 9

As you go down Group 1, the outermost electron in the shell is further from the nucleus. Which means the attraction between the outermost electron and the nucleus becomes less. So as you go down Group 1 the atoms get bigger, the outer electron is more easily lost making the metals more reactive

Question 10

What type of polymer is nylon

Answer 10

condensation polymer

Question 11

What small molecules accompany the formation of a condensation polymer

Answer 11

Water or hydrogen chloride

Question 12

What monomers are used in the production of nylon

Answer 12

a dicarboxylic acid and a diamine