Struggling with your prescribed literature?
Our Literature Study Guides provide insights and analysis of themes and characters and includes guidelines for writing your exam.
molecule where the ratio of atoms is 1 : 5, for example PCl5
small electrical cells such as those in watches, pacemakers, hearing aids and calculators.
a new species or substance that exists after a chemical reaction has occurred. This excludes un-...
if one reactant is available in excess, the other reactant will be the limiting reagent, because...