It is widely accepted that the level of achievement associated with AS might overlap highest grades at GCSE and lower A2 grades. The higher grades within the A2 are often regarded as more difficult to attain than many other level 3 qualifications. 34. The AS was introduced to promote the ...
What is a mole in chemistry GCSE? Chemists measure the amount of a substance in a unit called 'the mole'. ... It allows chemists to make predictions about the masses of different substances that are involved in reactions. One mole isthe Avogadro number of particles (atoms, molecules , ion...