GCSE Chemistry module: Calculations in Chemistrybr br By the end of this topic you will have covered:br - RAMbr - Calculating formulaebr - Molesbr - Gas volumesbr - Atom economybr - Yield in reactionsbr br GCSE revision videos and apps from LearnersCloud:br br To find out more and to start a free trial visit:br br To download our video streaming app for iPad, visit:br br To download our video streaming app for iPhone, visit:br