A comprehensive revision resource on Amount of substance (Moles). The worksheet is differentiated with each section increasing in difficulty. The fully editable resource includes Answers for each section so that students can check their progress. This is the complete set of questions including the second half of this resource, with questions on moles, ionic equations, atom economy, empirical formulae, percentage yield etc. The 1st half is available free to look at and download on this website with questions on Mole calculations, RFM, ionic equations etc.