sweemoi khor

chemistry chemistry spm spm paper 3 thermochemistry electrochemistry endothermic energy level diagram exothermic redox reaction spm 2009 food additives detergent soap 2012 trial spm 2012 gemstone alloy periodic table operational definition reactivity group 1 elements reactivity series trial spm 2011 alcohols experiment heat of combustion ironii ion ironiii ion rusting redox spm 2006 unvulcanised rubber vulcanised rubber isomers alkene pent-1-ene butane alkane but-1-ene pentane manufacture substances in industry instantaneous rate of reaciton average rate of reaction rubber charles goodyear vulcanization carbon compounds natural rubber topic rate of reaction graph chemicals potassium iodide solution elelctrolysis electrolysis aqueous solution concentration of acid ph value traditional medicine modern medicine comparision medicine form 5 chemicals for consumer trial 2009 analysis measuring diagram definition examination trial spm 2009 crystal salt weak alkali strong acid strong alkali weak acid alkali acid molarity concentration method dilution