reactionreaction coordinatesreaction graphreaction productsreaction progressreaction rate of constantreactivereactive dyereactive intermediate speciesreactivitionreactivityreactorreagentreal functionreal gasrearrangementrearrangement theoremreboilerrechargeable batteryreciprocal wavelengthrecorderrecording instrumentrecoveryrecrystallizationrectangular antiprismrectangular prismrectified spiritrectifierrecycle ratiorecycling ratiored leadred oxide of zincred shiftred zinc oreredox potentialredox reactionredox systemreducereduced massreduced variablereduced velocityreducerreducible representationreducing adaptorreducing agentreducing atmospherereductantreductionreference cellreference electrode